Eric Lee / smarc-fsl-linux-kernel

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Commit a327ca2c2674c5a9a0073421df19bfc362698136

Authored by Johannes Berg
Committed by Rusty Russell
1 parent 7d3b56ba37
Exists in master and in 39 other branches 8mp-imx_5.4.70_2.3.0, 8qm-imx_5.4.70_2.3.0, emb_imx_lf-5.15.y, emb_lf-6.1.y, imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, imx_4.1.15_1.0.0_ga, pitx_8mp_lf-5.10.y, rt-smarc-imx_4.1.15_1.0.0_ga, rt_linux_5.15.71, smarc-8m-android-11.0.0_2.0.0, smarc-imx6_4.14.98_2.0.0_ga, smarc-imx6_4.9.88_2.0.0_ga, smarc-imx7_4.14.98_2.0.0_ga, smarc-imx7_4.9.11_1.0.0_ga, smarc-imx7_4.9.88_2.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-imx_4.1.15_1.0.0_ga, smarc-imx_4.9.11_1.0.0_ga, smarc-imx_4.9.51_imx8m_ga, smarc-imx_4.9.88_2.0.0_ga, smarc-m6.0.1_2.1.0-ga, smarc-n7.1.2_2.0.0-ga, smarc-rel_imx_4.1.15_1.2.0_ga, smarc_8m_00d0_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.14.78_1.0.0_ga, smarc_8m_imx_4.14.98_2.0.0_ga, smarc_8m_imx_4.19.35_1.1.0, smarc_8mm_imx_4.14.78_1.0.0_ga, smarc_8mm_imx_4.14.98_2.0.0_ga, smarc_8mm_imx_4.19.35_1.1.0, smarc_8mm_imx_5.4.24_2.1.0, smarc_8mp_lf-5.10.y, smarc_8mq_imx_5.4.24_2.1.0, smarc_8mq_lf-5.10.y, smarc_imx_lf-5.15.y

remove CONFIG_KMOD 

Now that nothing depends on it any more, remove CONFIG_KMOD.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Showing 1 changed file with 0 additions and 6 deletions Inline Diff

1 config ARCH 1 config ARCH
2 string 2 string
3 option env="ARCH" 3 option env="ARCH"
4 4
5 config KERNELVERSION 5 config KERNELVERSION
6 string 6 string
7 option env="KERNELVERSION" 7 option env="KERNELVERSION"
8 8
9 config DEFCONFIG_LIST 9 config DEFCONFIG_LIST
10 string 10 string
11 depends on !UML 11 depends on !UML
12 option defconfig_list 12 option defconfig_list
13 default "/lib/modules/$UNAME_RELEASE/.config" 13 default "/lib/modules/$UNAME_RELEASE/.config"
14 default "/etc/kernel-config" 14 default "/etc/kernel-config"
15 default "/boot/config-$UNAME_RELEASE" 15 default "/boot/config-$UNAME_RELEASE"
16 default "$ARCH_DEFCONFIG" 16 default "$ARCH_DEFCONFIG"
17 default "arch/$ARCH/defconfig" 17 default "arch/$ARCH/defconfig"
18 18
19 menu "General setup" 19 menu "General setup"
20 20
21 config EXPERIMENTAL 21 config EXPERIMENTAL
22 bool "Prompt for development and/or incomplete code/drivers" 22 bool "Prompt for development and/or incomplete code/drivers"
23 ---help--- 23 ---help---
24 Some of the various things that Linux supports (such as network 24 Some of the various things that Linux supports (such as network
25 drivers, file systems, network protocols, etc.) can be in a state 25 drivers, file systems, network protocols, etc.) can be in a state
26 of development where the functionality, stability, or the level of 26 of development where the functionality, stability, or the level of
27 testing is not yet high enough for general use. This is usually 27 testing is not yet high enough for general use. This is usually
28 known as the "alpha-test" phase among developers. If a feature is 28 known as the "alpha-test" phase among developers. If a feature is
29 currently in alpha-test, then the developers usually discourage 29 currently in alpha-test, then the developers usually discourage
30 uninformed widespread use of this feature by the general public to 30 uninformed widespread use of this feature by the general public to
31 avoid "Why doesn't this work?" type mail messages. However, active 31 avoid "Why doesn't this work?" type mail messages. However, active
32 testing and use of these systems is welcomed. Just be aware that it 32 testing and use of these systems is welcomed. Just be aware that it
33 may not meet the normal level of reliability or it may fail to work 33 may not meet the normal level of reliability or it may fail to work
34 in some special cases. Detailed bug reports from people familiar 34 in some special cases. Detailed bug reports from people familiar
35 with the kernel internals are usually welcomed by the developers 35 with the kernel internals are usually welcomed by the developers
36 (before submitting bug reports, please read the documents 36 (before submitting bug reports, please read the documents
37 <file:README>, <file:MAINTAINERS>, <file:REPORTING-BUGS>, 37 <file:README>, <file:MAINTAINERS>, <file:REPORTING-BUGS>,
38 <file:Documentation/BUG-HUNTING>, and 38 <file:Documentation/BUG-HUNTING>, and
39 <file:Documentation/oops-tracing.txt> in the kernel source). 39 <file:Documentation/oops-tracing.txt> in the kernel source).
40 40
41 This option will also make obsoleted drivers available. These are 41 This option will also make obsoleted drivers available. These are
42 drivers that have been replaced by something else, and/or are 42 drivers that have been replaced by something else, and/or are
43 scheduled to be removed in a future kernel release. 43 scheduled to be removed in a future kernel release.
44 44
45 Unless you intend to help test and develop a feature or driver that 45 Unless you intend to help test and develop a feature or driver that
46 falls into this category, or you have a situation that requires 46 falls into this category, or you have a situation that requires
47 using these features, you should probably say N here, which will 47 using these features, you should probably say N here, which will
48 cause the configurator to present you with fewer choices. If 48 cause the configurator to present you with fewer choices. If
49 you say Y here, you will be offered the choice of using features or 49 you say Y here, you will be offered the choice of using features or
50 drivers that are currently considered to be in the alpha-test phase. 50 drivers that are currently considered to be in the alpha-test phase.
51 51
52 config BROKEN 52 config BROKEN
53 bool 53 bool
54 54
55 config BROKEN_ON_SMP 55 config BROKEN_ON_SMP
56 bool 56 bool
57 depends on BROKEN || !SMP 57 depends on BROKEN || !SMP
58 default y 58 default y
59 59
60 config LOCK_KERNEL 60 config LOCK_KERNEL
61 bool 61 bool
62 depends on SMP || PREEMPT 62 depends on SMP || PREEMPT
63 default y 63 default y
64 64
65 config INIT_ENV_ARG_LIMIT 65 config INIT_ENV_ARG_LIMIT
66 int 66 int
67 default 32 if !UML 67 default 32 if !UML
68 default 128 if UML 68 default 128 if UML
69 help 69 help
70 Maximum of each of the number of arguments and environment 70 Maximum of each of the number of arguments and environment
71 variables passed to init from the kernel command line. 71 variables passed to init from the kernel command line.
72 72
73 73
74 config LOCALVERSION 74 config LOCALVERSION
75 string "Local version - append to kernel release" 75 string "Local version - append to kernel release"
76 help 76 help
77 Append an extra string to the end of your kernel version. 77 Append an extra string to the end of your kernel version.
78 This will show up when you type uname, for example. 78 This will show up when you type uname, for example.
79 The string you set here will be appended after the contents of 79 The string you set here will be appended after the contents of
80 any files with a filename matching localversion* in your 80 any files with a filename matching localversion* in your
81 object and source tree, in that order. Your total string can 81 object and source tree, in that order. Your total string can
82 be a maximum of 64 characters. 82 be a maximum of 64 characters.
83 83
84 config LOCALVERSION_AUTO 84 config LOCALVERSION_AUTO
85 bool "Automatically append version information to the version string" 85 bool "Automatically append version information to the version string"
86 default y 86 default y
87 help 87 help
88 This will try to automatically determine if the current tree is a 88 This will try to automatically determine if the current tree is a
89 release tree by looking for git tags that belong to the current 89 release tree by looking for git tags that belong to the current
90 top of tree revision. 90 top of tree revision.
91 91
92 A string of the format -gxxxxxxxx will be added to the localversion 92 A string of the format -gxxxxxxxx will be added to the localversion
93 if a git-based tree is found. The string generated by this will be 93 if a git-based tree is found. The string generated by this will be
94 appended after any matching localversion* files, and after the value 94 appended after any matching localversion* files, and after the value
95 set in CONFIG_LOCALVERSION. 95 set in CONFIG_LOCALVERSION.
96 96
97 (The actual string used here is the first eight characters produced 97 (The actual string used here is the first eight characters produced
98 by running the command: 98 by running the command:
99 99
100 $ git rev-parse --verify HEAD 100 $ git rev-parse --verify HEAD
101 101
102 which is done within the script "scripts/setlocalversion".) 102 which is done within the script "scripts/setlocalversion".)
103 103
104 config SWAP 104 config SWAP
105 bool "Support for paging of anonymous memory (swap)" 105 bool "Support for paging of anonymous memory (swap)"
106 depends on MMU && BLOCK 106 depends on MMU && BLOCK
107 default y 107 default y
108 help 108 help
109 This option allows you to choose whether you want to have support 109 This option allows you to choose whether you want to have support
110 for so called swap devices or swap files in your kernel that are 110 for so called swap devices or swap files in your kernel that are
111 used to provide more virtual memory than the actual RAM present 111 used to provide more virtual memory than the actual RAM present
112 in your computer. If unsure say Y. 112 in your computer. If unsure say Y.
113 113
114 config SYSVIPC 114 config SYSVIPC
115 bool "System V IPC" 115 bool "System V IPC"
116 ---help--- 116 ---help---
117 Inter Process Communication is a suite of library functions and 117 Inter Process Communication is a suite of library functions and
118 system calls which let processes (running programs) synchronize and 118 system calls which let processes (running programs) synchronize and
119 exchange information. It is generally considered to be a good thing, 119 exchange information. It is generally considered to be a good thing,
120 and some programs won't run unless you say Y here. In particular, if 120 and some programs won't run unless you say Y here. In particular, if
121 you want to run the DOS emulator dosemu under Linux (read the 121 you want to run the DOS emulator dosemu under Linux (read the
122 DOSEMU-HOWTO, available from <http://www.tldp.org/docs.html#howto>), 122 DOSEMU-HOWTO, available from <http://www.tldp.org/docs.html#howto>),
123 you'll need to say Y here. 123 you'll need to say Y here.
124 124
125 You can find documentation about IPC with "info ipc" and also in 125 You can find documentation about IPC with "info ipc" and also in
126 section 6.4 of the Linux Programmer's Guide, available from 126 section 6.4 of the Linux Programmer's Guide, available from
127 <http://www.tldp.org/guides.html>. 127 <http://www.tldp.org/guides.html>.
128 128
129 config SYSVIPC_SYSCTL 129 config SYSVIPC_SYSCTL
130 bool 130 bool
131 depends on SYSVIPC 131 depends on SYSVIPC
132 depends on SYSCTL 132 depends on SYSCTL
133 default y 133 default y
134 134
135 config POSIX_MQUEUE 135 config POSIX_MQUEUE
136 bool "POSIX Message Queues" 136 bool "POSIX Message Queues"
137 depends on NET && EXPERIMENTAL 137 depends on NET && EXPERIMENTAL
138 ---help--- 138 ---help---
139 POSIX variant of message queues is a part of IPC. In POSIX message 139 POSIX variant of message queues is a part of IPC. In POSIX message
140 queues every message has a priority which decides about succession 140 queues every message has a priority which decides about succession
141 of receiving it by a process. If you want to compile and run 141 of receiving it by a process. If you want to compile and run
142 programs written e.g. for Solaris with use of its POSIX message 142 programs written e.g. for Solaris with use of its POSIX message
143 queues (functions mq_*) say Y here. 143 queues (functions mq_*) say Y here.
144 144
145 POSIX message queues are visible as a filesystem called 'mqueue' 145 POSIX message queues are visible as a filesystem called 'mqueue'
146 and can be mounted somewhere if you want to do filesystem 146 and can be mounted somewhere if you want to do filesystem
147 operations on message queues. 147 operations on message queues.
148 148
149 If unsure, say Y. 149 If unsure, say Y.
150 150
151 config BSD_PROCESS_ACCT 151 config BSD_PROCESS_ACCT
152 bool "BSD Process Accounting" 152 bool "BSD Process Accounting"
153 help 153 help
154 If you say Y here, a user level program will be able to instruct the 154 If you say Y here, a user level program will be able to instruct the
155 kernel (via a special system call) to write process accounting 155 kernel (via a special system call) to write process accounting
156 information to a file: whenever a process exits, information about 156 information to a file: whenever a process exits, information about
157 that process will be appended to the file by the kernel. The 157 that process will be appended to the file by the kernel. The
158 information includes things such as creation time, owning user, 158 information includes things such as creation time, owning user,
159 command name, memory usage, controlling terminal etc. (the complete 159 command name, memory usage, controlling terminal etc. (the complete
160 list is in the struct acct in <file:include/linux/acct.h>). It is 160 list is in the struct acct in <file:include/linux/acct.h>). It is
161 up to the user level program to do useful things with this 161 up to the user level program to do useful things with this
162 information. This is generally a good idea, so say Y. 162 information. This is generally a good idea, so say Y.
163 163
164 config BSD_PROCESS_ACCT_V3 164 config BSD_PROCESS_ACCT_V3
165 bool "BSD Process Accounting version 3 file format" 165 bool "BSD Process Accounting version 3 file format"
166 depends on BSD_PROCESS_ACCT 166 depends on BSD_PROCESS_ACCT
167 default n 167 default n
168 help 168 help
169 If you say Y here, the process accounting information is written 169 If you say Y here, the process accounting information is written
170 in a new file format that also logs the process IDs of each 170 in a new file format that also logs the process IDs of each
171 process and it's parent. Note that this file format is incompatible 171 process and it's parent. Note that this file format is incompatible
172 with previous v0/v1/v2 file formats, so you will need updated tools 172 with previous v0/v1/v2 file formats, so you will need updated tools
173 for processing it. A preliminary version of these tools is available 173 for processing it. A preliminary version of these tools is available
174 at <http://www.gnu.org/software/acct/>. 174 at <http://www.gnu.org/software/acct/>.
175 175
176 config TASKSTATS 176 config TASKSTATS
177 bool "Export task/process statistics through netlink (EXPERIMENTAL)" 177 bool "Export task/process statistics through netlink (EXPERIMENTAL)"
178 depends on NET 178 depends on NET
179 default n 179 default n
180 help 180 help
181 Export selected statistics for tasks/processes through the 181 Export selected statistics for tasks/processes through the
182 generic netlink interface. Unlike BSD process accounting, the 182 generic netlink interface. Unlike BSD process accounting, the
183 statistics are available during the lifetime of tasks/processes as 183 statistics are available during the lifetime of tasks/processes as
184 responses to commands. Like BSD accounting, they are sent to user 184 responses to commands. Like BSD accounting, they are sent to user
185 space on task exit. 185 space on task exit.
186 186
187 Say N if unsure. 187 Say N if unsure.
188 188
189 config TASK_DELAY_ACCT 189 config TASK_DELAY_ACCT
190 bool "Enable per-task delay accounting (EXPERIMENTAL)" 190 bool "Enable per-task delay accounting (EXPERIMENTAL)"
191 depends on TASKSTATS 191 depends on TASKSTATS
192 help 192 help
193 Collect information on time spent by a task waiting for system 193 Collect information on time spent by a task waiting for system
194 resources like cpu, synchronous block I/O completion and swapping 194 resources like cpu, synchronous block I/O completion and swapping
195 in pages. Such statistics can help in setting a task's priorities 195 in pages. Such statistics can help in setting a task's priorities
196 relative to other tasks for cpu, io, rss limits etc. 196 relative to other tasks for cpu, io, rss limits etc.
197 197
198 Say N if unsure. 198 Say N if unsure.
199 199
200 config TASK_XACCT 200 config TASK_XACCT
201 bool "Enable extended accounting over taskstats (EXPERIMENTAL)" 201 bool "Enable extended accounting over taskstats (EXPERIMENTAL)"
202 depends on TASKSTATS 202 depends on TASKSTATS
203 help 203 help
204 Collect extended task accounting data and send the data 204 Collect extended task accounting data and send the data
205 to userland for processing over the taskstats interface. 205 to userland for processing over the taskstats interface.
206 206
207 Say N if unsure. 207 Say N if unsure.
208 208
209 config TASK_IO_ACCOUNTING 209 config TASK_IO_ACCOUNTING
210 bool "Enable per-task storage I/O accounting (EXPERIMENTAL)" 210 bool "Enable per-task storage I/O accounting (EXPERIMENTAL)"
211 depends on TASK_XACCT 211 depends on TASK_XACCT
212 help 212 help
213 Collect information on the number of bytes of storage I/O which this 213 Collect information on the number of bytes of storage I/O which this
214 task has caused. 214 task has caused.
215 215
216 Say N if unsure. 216 Say N if unsure.
217 217
218 config AUDIT 218 config AUDIT
219 bool "Auditing support" 219 bool "Auditing support"
220 depends on NET 220 depends on NET
221 help 221 help
222 Enable auditing infrastructure that can be used with another 222 Enable auditing infrastructure that can be used with another
223 kernel subsystem, such as SELinux (which requires this for 223 kernel subsystem, such as SELinux (which requires this for
224 logging of avc messages output). Does not do system-call 224 logging of avc messages output). Does not do system-call
225 auditing without CONFIG_AUDITSYSCALL. 225 auditing without CONFIG_AUDITSYSCALL.
226 226
227 config AUDITSYSCALL 227 config AUDITSYSCALL
228 bool "Enable system-call auditing support" 228 bool "Enable system-call auditing support"
229 depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64|| SUPERH) 229 depends on AUDIT && (X86 || PPC || PPC64 || S390 || IA64 || UML || SPARC64|| SUPERH)
230 default y if SECURITY_SELINUX 230 default y if SECURITY_SELINUX
231 help 231 help
232 Enable low-overhead system-call auditing infrastructure that 232 Enable low-overhead system-call auditing infrastructure that
233 can be used independently or with another kernel subsystem, 233 can be used independently or with another kernel subsystem,
234 such as SELinux. To use audit's filesystem watch feature, please 234 such as SELinux. To use audit's filesystem watch feature, please
235 ensure that INOTIFY is configured. 235 ensure that INOTIFY is configured.
236 236
237 config AUDIT_TREE 237 config AUDIT_TREE
238 def_bool y 238 def_bool y
239 depends on AUDITSYSCALL && INOTIFY 239 depends on AUDITSYSCALL && INOTIFY
240 240
241 config IKCONFIG 241 config IKCONFIG
242 tristate "Kernel .config support" 242 tristate "Kernel .config support"
243 ---help--- 243 ---help---
244 This option enables the complete Linux kernel ".config" file 244 This option enables the complete Linux kernel ".config" file
245 contents to be saved in the kernel. It provides documentation 245 contents to be saved in the kernel. It provides documentation
246 of which kernel options are used in a running kernel or in an 246 of which kernel options are used in a running kernel or in an
247 on-disk kernel. This information can be extracted from the kernel 247 on-disk kernel. This information can be extracted from the kernel
248 image file with the script scripts/extract-ikconfig and used as 248 image file with the script scripts/extract-ikconfig and used as
249 input to rebuild the current kernel or to build another kernel. 249 input to rebuild the current kernel or to build another kernel.
250 It can also be extracted from a running kernel by reading 250 It can also be extracted from a running kernel by reading
251 /proc/config.gz if enabled (below). 251 /proc/config.gz if enabled (below).
252 252
253 config IKCONFIG_PROC 253 config IKCONFIG_PROC
254 bool "Enable access to .config through /proc/config.gz" 254 bool "Enable access to .config through /proc/config.gz"
255 depends on IKCONFIG && PROC_FS 255 depends on IKCONFIG && PROC_FS
256 ---help--- 256 ---help---
257 This option enables access to the kernel configuration file 257 This option enables access to the kernel configuration file
258 through /proc/config.gz. 258 through /proc/config.gz.
259 259
260 config LOG_BUF_SHIFT 260 config LOG_BUF_SHIFT
261 int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" 261 int "Kernel log buffer size (16 => 64KB, 17 => 128KB)"
262 range 12 21 262 range 12 21
263 default 17 263 default 17
264 help 264 help
265 Select kernel log buffer size as a power of 2. 265 Select kernel log buffer size as a power of 2.
266 Examples: 266 Examples:
267 17 => 128 KB 267 17 => 128 KB
268 16 => 64 KB 268 16 => 64 KB
269 15 => 32 KB 269 15 => 32 KB
270 14 => 16 KB 270 14 => 16 KB
271 13 => 8 KB 271 13 => 8 KB
272 12 => 4 KB 272 12 => 4 KB
273 273
274 config CGROUPS 274 config CGROUPS
275 bool "Control Group support" 275 bool "Control Group support"
276 help 276 help
277 This option will let you use process cgroup subsystems 277 This option will let you use process cgroup subsystems
278 such as Cpusets 278 such as Cpusets
279 279
280 Say N if unsure. 280 Say N if unsure.
281 281
282 config CGROUP_DEBUG 282 config CGROUP_DEBUG
283 bool "Example debug cgroup subsystem" 283 bool "Example debug cgroup subsystem"
284 depends on CGROUPS 284 depends on CGROUPS
285 default n 285 default n
286 help 286 help
287 This option enables a simple cgroup subsystem that 287 This option enables a simple cgroup subsystem that
288 exports useful debugging information about the cgroups 288 exports useful debugging information about the cgroups
289 framework 289 framework
290 290
291 Say N if unsure 291 Say N if unsure
292 292
293 config CGROUP_NS 293 config CGROUP_NS
294 bool "Namespace cgroup subsystem" 294 bool "Namespace cgroup subsystem"
295 depends on CGROUPS 295 depends on CGROUPS
296 help 296 help
297 Provides a simple namespace cgroup subsystem to 297 Provides a simple namespace cgroup subsystem to
298 provide hierarchical naming of sets of namespaces, 298 provide hierarchical naming of sets of namespaces,
299 for instance virtual servers and checkpoint/restart 299 for instance virtual servers and checkpoint/restart
300 jobs. 300 jobs.
301 301
302 config CGROUP_FREEZER 302 config CGROUP_FREEZER
303 bool "control group freezer subsystem" 303 bool "control group freezer subsystem"
304 depends on CGROUPS 304 depends on CGROUPS
305 help 305 help
306 Provides a way to freeze and unfreeze all tasks in a 306 Provides a way to freeze and unfreeze all tasks in a
307 cgroup. 307 cgroup.
308 308
309 config CGROUP_DEVICE 309 config CGROUP_DEVICE
310 bool "Device controller for cgroups" 310 bool "Device controller for cgroups"
311 depends on CGROUPS && EXPERIMENTAL 311 depends on CGROUPS && EXPERIMENTAL
312 help 312 help
313 Provides a cgroup implementing whitelists for devices which 313 Provides a cgroup implementing whitelists for devices which
314 a process in the cgroup can mknod or open. 314 a process in the cgroup can mknod or open.
315 315
316 config CPUSETS 316 config CPUSETS
317 bool "Cpuset support" 317 bool "Cpuset support"
318 depends on SMP && CGROUPS 318 depends on SMP && CGROUPS
319 help 319 help
320 This option will let you create and manage CPUSETs which 320 This option will let you create and manage CPUSETs which
321 allow dynamically partitioning a system into sets of CPUs and 321 allow dynamically partitioning a system into sets of CPUs and
322 Memory Nodes and assigning tasks to run only within those sets. 322 Memory Nodes and assigning tasks to run only within those sets.
323 This is primarily useful on large SMP or NUMA systems. 323 This is primarily useful on large SMP or NUMA systems.
324 324
325 Say N if unsure. 325 Say N if unsure.
326 326
327 # 327 #
328 # Architectures with an unreliable sched_clock() should select this: 328 # Architectures with an unreliable sched_clock() should select this:
329 # 329 #
330 config HAVE_UNSTABLE_SCHED_CLOCK 330 config HAVE_UNSTABLE_SCHED_CLOCK
331 bool 331 bool
332 332
333 config GROUP_SCHED 333 config GROUP_SCHED
334 bool "Group CPU scheduler" 334 bool "Group CPU scheduler"
335 depends on EXPERIMENTAL 335 depends on EXPERIMENTAL
336 default n 336 default n
337 help 337 help
338 This feature lets CPU scheduler recognize task groups and control CPU 338 This feature lets CPU scheduler recognize task groups and control CPU
339 bandwidth allocation to such task groups. 339 bandwidth allocation to such task groups.
340 340
341 config FAIR_GROUP_SCHED 341 config FAIR_GROUP_SCHED
342 bool "Group scheduling for SCHED_OTHER" 342 bool "Group scheduling for SCHED_OTHER"
343 depends on GROUP_SCHED 343 depends on GROUP_SCHED
344 default GROUP_SCHED 344 default GROUP_SCHED
345 345
346 config RT_GROUP_SCHED 346 config RT_GROUP_SCHED
347 bool "Group scheduling for SCHED_RR/FIFO" 347 bool "Group scheduling for SCHED_RR/FIFO"
348 depends on EXPERIMENTAL 348 depends on EXPERIMENTAL
349 depends on GROUP_SCHED 349 depends on GROUP_SCHED
350 default n 350 default n
351 help 351 help
352 This feature lets you explicitly allocate real CPU bandwidth 352 This feature lets you explicitly allocate real CPU bandwidth
353 to users or control groups (depending on the "Basis for grouping tasks" 353 to users or control groups (depending on the "Basis for grouping tasks"
354 setting below. If enabled, it will also make it impossible to 354 setting below. If enabled, it will also make it impossible to
355 schedule realtime tasks for non-root users until you allocate 355 schedule realtime tasks for non-root users until you allocate
356 realtime bandwidth for them. 356 realtime bandwidth for them.
357 See Documentation/scheduler/sched-rt-group.txt for more information. 357 See Documentation/scheduler/sched-rt-group.txt for more information.
358 358
359 choice 359 choice
360 depends on GROUP_SCHED 360 depends on GROUP_SCHED
361 prompt "Basis for grouping tasks" 361 prompt "Basis for grouping tasks"
362 default USER_SCHED 362 default USER_SCHED
363 363
364 config USER_SCHED 364 config USER_SCHED
365 bool "user id" 365 bool "user id"
366 help 366 help
367 This option will choose userid as the basis for grouping 367 This option will choose userid as the basis for grouping
368 tasks, thus providing equal CPU bandwidth to each user. 368 tasks, thus providing equal CPU bandwidth to each user.
369 369
370 config CGROUP_SCHED 370 config CGROUP_SCHED
371 bool "Control groups" 371 bool "Control groups"
372 depends on CGROUPS 372 depends on CGROUPS
373 help 373 help
374 This option allows you to create arbitrary task groups 374 This option allows you to create arbitrary task groups
375 using the "cgroup" pseudo filesystem and control 375 using the "cgroup" pseudo filesystem and control
376 the cpu bandwidth allocated to each such task group. 376 the cpu bandwidth allocated to each such task group.
377 Refer to Documentation/cgroups.txt for more information 377 Refer to Documentation/cgroups.txt for more information
378 on "cgroup" pseudo filesystem. 378 on "cgroup" pseudo filesystem.
379 379
380 endchoice 380 endchoice
381 381
382 config CGROUP_CPUACCT 382 config CGROUP_CPUACCT
383 bool "Simple CPU accounting cgroup subsystem" 383 bool "Simple CPU accounting cgroup subsystem"
384 depends on CGROUPS 384 depends on CGROUPS
385 help 385 help
386 Provides a simple Resource Controller for monitoring the 386 Provides a simple Resource Controller for monitoring the
387 total CPU consumed by the tasks in a cgroup 387 total CPU consumed by the tasks in a cgroup
388 388
389 config RESOURCE_COUNTERS 389 config RESOURCE_COUNTERS
390 bool "Resource counters" 390 bool "Resource counters"
391 help 391 help
392 This option enables controller independent resource accounting 392 This option enables controller independent resource accounting
393 infrastructure that works with cgroups 393 infrastructure that works with cgroups
394 depends on CGROUPS 394 depends on CGROUPS
395 395
396 config MM_OWNER 396 config MM_OWNER
397 bool 397 bool
398 398
399 config CGROUP_MEM_RES_CTLR 399 config CGROUP_MEM_RES_CTLR
400 bool "Memory Resource Controller for Control Groups" 400 bool "Memory Resource Controller for Control Groups"
401 depends on CGROUPS && RESOURCE_COUNTERS 401 depends on CGROUPS && RESOURCE_COUNTERS
402 select MM_OWNER 402 select MM_OWNER
403 help 403 help
404 Provides a memory resource controller that manages both anonymous 404 Provides a memory resource controller that manages both anonymous
405 memory and page cache. (See Documentation/controllers/memory.txt) 405 memory and page cache. (See Documentation/controllers/memory.txt)
406 406
407 Note that setting this option increases fixed memory overhead 407 Note that setting this option increases fixed memory overhead
408 associated with each page of memory in the system. By this, 408 associated with each page of memory in the system. By this,
409 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory 409 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
410 usage tracking struct at boot. Total amount of this is printed out 410 usage tracking struct at boot. Total amount of this is printed out
411 at boot. 411 at boot.
412 412
413 Only enable when you're ok with these trade offs and really 413 Only enable when you're ok with these trade offs and really
414 sure you need the memory resource controller. Even when you enable 414 sure you need the memory resource controller. Even when you enable
415 this, you can set "cgroup_disable=memory" at your boot option to 415 this, you can set "cgroup_disable=memory" at your boot option to
416 disable memory resource controller and you can avoid overheads. 416 disable memory resource controller and you can avoid overheads.
417 (and lose benefits of memory resource contoller) 417 (and lose benefits of memory resource contoller)
418 418
419 This config option also selects MM_OWNER config option, which 419 This config option also selects MM_OWNER config option, which
420 could in turn add some fork/exit overhead. 420 could in turn add some fork/exit overhead.
421 421
422 config SYSFS_DEPRECATED 422 config SYSFS_DEPRECATED
423 bool 423 bool
424 424
425 config SYSFS_DEPRECATED_V2 425 config SYSFS_DEPRECATED_V2
426 bool "Create deprecated sysfs files" 426 bool "Create deprecated sysfs files"
427 depends on SYSFS 427 depends on SYSFS
428 default y 428 default y
429 select SYSFS_DEPRECATED 429 select SYSFS_DEPRECATED
430 help 430 help
431 This option creates deprecated symlinks such as the 431 This option creates deprecated symlinks such as the
432 "device"-link, the <subsystem>:<name>-link, and the 432 "device"-link, the <subsystem>:<name>-link, and the
433 "bus"-link. It may also add deprecated key in the 433 "bus"-link. It may also add deprecated key in the
434 uevent environment. 434 uevent environment.
435 None of these features or values should be used today, as 435 None of these features or values should be used today, as
436 they export driver core implementation details to userspace 436 they export driver core implementation details to userspace
437 or export properties which can't be kept stable across kernel 437 or export properties which can't be kept stable across kernel
438 releases. 438 releases.
439 439
440 If enabled, this option will also move any device structures 440 If enabled, this option will also move any device structures
441 that belong to a class, back into the /sys/class hierarchy, in 441 that belong to a class, back into the /sys/class hierarchy, in
442 order to support older versions of udev and some userspace 442 order to support older versions of udev and some userspace
443 programs. 443 programs.
444 444
445 If you are using a distro with the most recent userspace 445 If you are using a distro with the most recent userspace
446 packages, it should be safe to say N here. 446 packages, it should be safe to say N here.
447 447
448 config PROC_PID_CPUSET 448 config PROC_PID_CPUSET
449 bool "Include legacy /proc/<pid>/cpuset file" 449 bool "Include legacy /proc/<pid>/cpuset file"
450 depends on CPUSETS 450 depends on CPUSETS
451 default y 451 default y
452 452
453 config RELAY 453 config RELAY
454 bool "Kernel->user space relay support (formerly relayfs)" 454 bool "Kernel->user space relay support (formerly relayfs)"
455 help 455 help
456 This option enables support for relay interface support in 456 This option enables support for relay interface support in
457 certain file systems (such as debugfs). 457 certain file systems (such as debugfs).
458 It is designed to provide an efficient mechanism for tools and 458 It is designed to provide an efficient mechanism for tools and
459 facilities to relay large amounts of data from kernel space to 459 facilities to relay large amounts of data from kernel space to
460 user space. 460 user space.
461 461
462 If unsure, say N. 462 If unsure, say N.
463 463
464 config NAMESPACES 464 config NAMESPACES
465 bool "Namespaces support" if EMBEDDED 465 bool "Namespaces support" if EMBEDDED
466 default !EMBEDDED 466 default !EMBEDDED
467 help 467 help
468 Provides the way to make tasks work with different objects using 468 Provides the way to make tasks work with different objects using
469 the same id. For example same IPC id may refer to different objects 469 the same id. For example same IPC id may refer to different objects
470 or same user id or pid may refer to different tasks when used in 470 or same user id or pid may refer to different tasks when used in
471 different namespaces. 471 different namespaces.
472 472
473 config UTS_NS 473 config UTS_NS
474 bool "UTS namespace" 474 bool "UTS namespace"
475 depends on NAMESPACES 475 depends on NAMESPACES
476 help 476 help
477 In this namespace tasks see different info provided with the 477 In this namespace tasks see different info provided with the
478 uname() system call 478 uname() system call
479 479
480 config IPC_NS 480 config IPC_NS
481 bool "IPC namespace" 481 bool "IPC namespace"
482 depends on NAMESPACES && SYSVIPC 482 depends on NAMESPACES && SYSVIPC
483 help 483 help
484 In this namespace tasks work with IPC ids which correspond to 484 In this namespace tasks work with IPC ids which correspond to
485 different IPC objects in different namespaces 485 different IPC objects in different namespaces
486 486
487 config USER_NS 487 config USER_NS
488 bool "User namespace (EXPERIMENTAL)" 488 bool "User namespace (EXPERIMENTAL)"
489 depends on NAMESPACES && EXPERIMENTAL 489 depends on NAMESPACES && EXPERIMENTAL
490 help 490 help
491 This allows containers, i.e. vservers, to use user namespaces 491 This allows containers, i.e. vservers, to use user namespaces
492 to provide different user info for different servers. 492 to provide different user info for different servers.
493 If unsure, say N. 493 If unsure, say N.
494 494
495 config PID_NS 495 config PID_NS
496 bool "PID Namespaces (EXPERIMENTAL)" 496 bool "PID Namespaces (EXPERIMENTAL)"
497 default n 497 default n
498 depends on NAMESPACES && EXPERIMENTAL 498 depends on NAMESPACES && EXPERIMENTAL
499 help 499 help
500 Support process id namespaces. This allows having multiple 500 Support process id namespaces. This allows having multiple
501 process with the same pid as long as they are in different 501 process with the same pid as long as they are in different
502 pid namespaces. This is a building block of containers. 502 pid namespaces. This is a building block of containers.
503 503
504 Unless you want to work with an experimental feature 504 Unless you want to work with an experimental feature
505 say N here. 505 say N here.
506 506
507 config BLK_DEV_INITRD 507 config BLK_DEV_INITRD
508 bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support" 508 bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
509 depends on BROKEN || !FRV 509 depends on BROKEN || !FRV
510 help 510 help
511 The initial RAM filesystem is a ramfs which is loaded by the 511 The initial RAM filesystem is a ramfs which is loaded by the
512 boot loader (loadlin or lilo) and that is mounted as root 512 boot loader (loadlin or lilo) and that is mounted as root
513 before the normal boot procedure. It is typically used to 513 before the normal boot procedure. It is typically used to
514 load modules needed to mount the "real" root file system, 514 load modules needed to mount the "real" root file system,
515 etc. See <file:Documentation/initrd.txt> for details. 515 etc. See <file:Documentation/initrd.txt> for details.
516 516
517 If RAM disk support (BLK_DEV_RAM) is also included, this 517 If RAM disk support (BLK_DEV_RAM) is also included, this
518 also enables initial RAM disk (initrd) support and adds 518 also enables initial RAM disk (initrd) support and adds
519 15 Kbytes (more on some other architectures) to the kernel size. 519 15 Kbytes (more on some other architectures) to the kernel size.
520 520
521 If unsure say Y. 521 If unsure say Y.
522 522
523 if BLK_DEV_INITRD 523 if BLK_DEV_INITRD
524 524
525 source "usr/Kconfig" 525 source "usr/Kconfig"
526 526
527 endif 527 endif
528 528
529 config CC_OPTIMIZE_FOR_SIZE 529 config CC_OPTIMIZE_FOR_SIZE
530 bool "Optimize for size" 530 bool "Optimize for size"
531 default y 531 default y
532 help 532 help
533 Enabling this option will pass "-Os" instead of "-O2" to gcc 533 Enabling this option will pass "-Os" instead of "-O2" to gcc
534 resulting in a smaller kernel. 534 resulting in a smaller kernel.
535 535
536 If unsure, say Y. 536 If unsure, say Y.
537 537
538 config SYSCTL 538 config SYSCTL
539 bool 539 bool
540 540
541 menuconfig EMBEDDED 541 menuconfig EMBEDDED
542 bool "Configure standard kernel features (for small systems)" 542 bool "Configure standard kernel features (for small systems)"
543 help 543 help
544 This option allows certain base kernel options and settings 544 This option allows certain base kernel options and settings
545 to be disabled or tweaked. This is for specialized 545 to be disabled or tweaked. This is for specialized
546 environments which can tolerate a "non-standard" kernel. 546 environments which can tolerate a "non-standard" kernel.
547 Only use this if you really know what you are doing. 547 Only use this if you really know what you are doing.
548 548
549 config UID16 549 config UID16
550 bool "Enable 16-bit UID system calls" if EMBEDDED 550 bool "Enable 16-bit UID system calls" if EMBEDDED
551 depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION) 551 depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION)
552 default y 552 default y
553 help 553 help
554 This enables the legacy 16-bit UID syscall wrappers. 554 This enables the legacy 16-bit UID syscall wrappers.
555 555
556 config SYSCTL_SYSCALL 556 config SYSCTL_SYSCALL
557 bool "Sysctl syscall support" if EMBEDDED 557 bool "Sysctl syscall support" if EMBEDDED
558 default y 558 default y
559 select SYSCTL 559 select SYSCTL
560 ---help--- 560 ---help---
561 sys_sysctl uses binary paths that have been found challenging 561 sys_sysctl uses binary paths that have been found challenging
562 to properly maintain and use. The interface in /proc/sys 562 to properly maintain and use. The interface in /proc/sys
563 using paths with ascii names is now the primary path to this 563 using paths with ascii names is now the primary path to this
564 information. 564 information.
565 565
566 Almost nothing using the binary sysctl interface so if you are 566 Almost nothing using the binary sysctl interface so if you are
567 trying to save some space it is probably safe to disable this, 567 trying to save some space it is probably safe to disable this,
568 making your kernel marginally smaller. 568 making your kernel marginally smaller.
569 569
570 If unsure say Y here. 570 If unsure say Y here.
571 571
572 config KALLSYMS 572 config KALLSYMS
573 bool "Load all symbols for debugging/ksymoops" if EMBEDDED 573 bool "Load all symbols for debugging/ksymoops" if EMBEDDED
574 default y 574 default y
575 help 575 help
576 Say Y here to let the kernel print out symbolic crash information and 576 Say Y here to let the kernel print out symbolic crash information and
577 symbolic stack backtraces. This increases the size of the kernel 577 symbolic stack backtraces. This increases the size of the kernel
578 somewhat, as all symbols have to be loaded into the kernel image. 578 somewhat, as all symbols have to be loaded into the kernel image.
579 579
580 config KALLSYMS_ALL 580 config KALLSYMS_ALL
581 bool "Include all symbols in kallsyms" 581 bool "Include all symbols in kallsyms"
582 depends on DEBUG_KERNEL && KALLSYMS 582 depends on DEBUG_KERNEL && KALLSYMS
583 help 583 help
584 Normally kallsyms only contains the symbols of functions, for nicer 584 Normally kallsyms only contains the symbols of functions, for nicer
585 OOPS messages. Some debuggers can use kallsyms for other 585 OOPS messages. Some debuggers can use kallsyms for other
586 symbols too: say Y here to include all symbols, if you need them 586 symbols too: say Y here to include all symbols, if you need them
587 and you don't care about adding 300k to the size of your kernel. 587 and you don't care about adding 300k to the size of your kernel.
588 588
589 Say N. 589 Say N.
590 590
591 config KALLSYMS_STRIP_GENERATED 591 config KALLSYMS_STRIP_GENERATED
592 bool "Strip machine generated symbols from kallsyms" 592 bool "Strip machine generated symbols from kallsyms"
593 depends on KALLSYMS_ALL 593 depends on KALLSYMS_ALL
594 default y 594 default y
595 help 595 help
596 Say N if you want kallsyms to retain even machine generated symbols. 596 Say N if you want kallsyms to retain even machine generated symbols.
597 597
598 config KALLSYMS_EXTRA_PASS 598 config KALLSYMS_EXTRA_PASS
599 bool "Do an extra kallsyms pass" 599 bool "Do an extra kallsyms pass"
600 depends on KALLSYMS 600 depends on KALLSYMS
601 help 601 help
602 If kallsyms is not working correctly, the build will fail with 602 If kallsyms is not working correctly, the build will fail with
603 inconsistent kallsyms data. If that occurs, log a bug report and 603 inconsistent kallsyms data. If that occurs, log a bug report and
604 turn on KALLSYMS_EXTRA_PASS which should result in a stable build. 604 turn on KALLSYMS_EXTRA_PASS which should result in a stable build.
605 Always say N here unless you find a bug in kallsyms, which must be 605 Always say N here unless you find a bug in kallsyms, which must be
606 reported. KALLSYMS_EXTRA_PASS is only a temporary workaround while 606 reported. KALLSYMS_EXTRA_PASS is only a temporary workaround while
607 you wait for kallsyms to be fixed. 607 you wait for kallsyms to be fixed.
608 608
609 609
610 config HOTPLUG 610 config HOTPLUG
611 bool "Support for hot-pluggable devices" if EMBEDDED 611 bool "Support for hot-pluggable devices" if EMBEDDED
612 default y 612 default y
613 help 613 help
614 This option is provided for the case where no hotplug or uevent 614 This option is provided for the case where no hotplug or uevent
615 capabilities is wanted by the kernel. You should only consider 615 capabilities is wanted by the kernel. You should only consider
616 disabling this option for embedded systems that do not use modules, a 616 disabling this option for embedded systems that do not use modules, a
617 dynamic /dev tree, or dynamic device discovery. Just say Y. 617 dynamic /dev tree, or dynamic device discovery. Just say Y.
618 618
619 config PRINTK 619 config PRINTK
620 default y 620 default y
621 bool "Enable support for printk" if EMBEDDED 621 bool "Enable support for printk" if EMBEDDED
622 help 622 help
623 This option enables normal printk support. Removing it 623 This option enables normal printk support. Removing it
624 eliminates most of the message strings from the kernel image 624 eliminates most of the message strings from the kernel image
625 and makes the kernel more or less silent. As this makes it 625 and makes the kernel more or less silent. As this makes it
626 very difficult to diagnose system problems, saying N here is 626 very difficult to diagnose system problems, saying N here is
627 strongly discouraged. 627 strongly discouraged.
628 628
629 config BUG 629 config BUG
630 bool "BUG() support" if EMBEDDED 630 bool "BUG() support" if EMBEDDED
631 default y 631 default y
632 help 632 help
633 Disabling this option eliminates support for BUG and WARN, reducing 633 Disabling this option eliminates support for BUG and WARN, reducing
634 the size of your kernel image and potentially quietly ignoring 634 the size of your kernel image and potentially quietly ignoring
635 numerous fatal conditions. You should only consider disabling this 635 numerous fatal conditions. You should only consider disabling this
636 option for embedded systems with no facilities for reporting errors. 636 option for embedded systems with no facilities for reporting errors.
637 Just say Y. 637 Just say Y.
638 638
639 config ELF_CORE 639 config ELF_CORE
640 default y 640 default y
641 bool "Enable ELF core dumps" if EMBEDDED 641 bool "Enable ELF core dumps" if EMBEDDED
642 help 642 help
643 Enable support for generating core dumps. Disabling saves about 4k. 643 Enable support for generating core dumps. Disabling saves about 4k.
644 644
645 config PCSPKR_PLATFORM 645 config PCSPKR_PLATFORM
646 bool "Enable PC-Speaker support" if EMBEDDED 646 bool "Enable PC-Speaker support" if EMBEDDED
647 depends on ALPHA || X86 || MIPS || PPC_PREP || PPC_CHRP || PPC_PSERIES 647 depends on ALPHA || X86 || MIPS || PPC_PREP || PPC_CHRP || PPC_PSERIES
648 default y 648 default y
649 help 649 help
650 This option allows to disable the internal PC-Speaker 650 This option allows to disable the internal PC-Speaker
651 support, saving some memory. 651 support, saving some memory.
652 652
653 config COMPAT_BRK 653 config COMPAT_BRK
654 bool "Disable heap randomization" 654 bool "Disable heap randomization"
655 default y 655 default y
656 help 656 help
657 Randomizing heap placement makes heap exploits harder, but it 657 Randomizing heap placement makes heap exploits harder, but it
658 also breaks ancient binaries (including anything libc5 based). 658 also breaks ancient binaries (including anything libc5 based).
659 This option changes the bootup default to heap randomization 659 This option changes the bootup default to heap randomization
660 disabled, and can be overriden runtime by setting 660 disabled, and can be overriden runtime by setting
661 /proc/sys/kernel/randomize_va_space to 2. 661 /proc/sys/kernel/randomize_va_space to 2.
662 662
663 On non-ancient distros (post-2000 ones) N is usually a safe choice. 663 On non-ancient distros (post-2000 ones) N is usually a safe choice.
664 664
665 config BASE_FULL 665 config BASE_FULL
666 default y 666 default y
667 bool "Enable full-sized data structures for core" if EMBEDDED 667 bool "Enable full-sized data structures for core" if EMBEDDED
668 help 668 help
669 Disabling this option reduces the size of miscellaneous core 669 Disabling this option reduces the size of miscellaneous core
670 kernel data structures. This saves memory on small machines, 670 kernel data structures. This saves memory on small machines,
671 but may reduce performance. 671 but may reduce performance.
672 672
673 config FUTEX 673 config FUTEX
674 bool "Enable futex support" if EMBEDDED 674 bool "Enable futex support" if EMBEDDED
675 default y 675 default y
676 select RT_MUTEXES 676 select RT_MUTEXES
677 help 677 help
678 Disabling this option will cause the kernel to be built without 678 Disabling this option will cause the kernel to be built without
679 support for "fast userspace mutexes". The resulting kernel may not 679 support for "fast userspace mutexes". The resulting kernel may not
680 run glibc-based applications correctly. 680 run glibc-based applications correctly.
681 681
682 config ANON_INODES 682 config ANON_INODES
683 bool 683 bool
684 684
685 config EPOLL 685 config EPOLL
686 bool "Enable eventpoll support" if EMBEDDED 686 bool "Enable eventpoll support" if EMBEDDED
687 default y 687 default y
688 select ANON_INODES 688 select ANON_INODES
689 help 689 help
690 Disabling this option will cause the kernel to be built without 690 Disabling this option will cause the kernel to be built without
691 support for epoll family of system calls. 691 support for epoll family of system calls.
692 692
693 config SIGNALFD 693 config SIGNALFD
694 bool "Enable signalfd() system call" if EMBEDDED 694 bool "Enable signalfd() system call" if EMBEDDED
695 select ANON_INODES 695 select ANON_INODES
696 default y 696 default y
697 help 697 help
698 Enable the signalfd() system call that allows to receive signals 698 Enable the signalfd() system call that allows to receive signals
699 on a file descriptor. 699 on a file descriptor.
700 700
701 If unsure, say Y. 701 If unsure, say Y.
702 702
703 config TIMERFD 703 config TIMERFD
704 bool "Enable timerfd() system call" if EMBEDDED 704 bool "Enable timerfd() system call" if EMBEDDED
705 select ANON_INODES 705 select ANON_INODES
706 default y 706 default y
707 help 707 help
708 Enable the timerfd() system call that allows to receive timer 708 Enable the timerfd() system call that allows to receive timer
709 events on a file descriptor. 709 events on a file descriptor.
710 710
711 If unsure, say Y. 711 If unsure, say Y.
712 712
713 config EVENTFD 713 config EVENTFD
714 bool "Enable eventfd() system call" if EMBEDDED 714 bool "Enable eventfd() system call" if EMBEDDED
715 select ANON_INODES 715 select ANON_INODES
716 default y 716 default y
717 help 717 help
718 Enable the eventfd() system call that allows to receive both 718 Enable the eventfd() system call that allows to receive both
719 kernel notification (ie. KAIO) or userspace notifications. 719 kernel notification (ie. KAIO) or userspace notifications.
720 720
721 If unsure, say Y. 721 If unsure, say Y.
722 722
723 config SHMEM 723 config SHMEM
724 bool "Use full shmem filesystem" if EMBEDDED 724 bool "Use full shmem filesystem" if EMBEDDED
725 default y 725 default y
726 depends on MMU 726 depends on MMU
727 help 727 help
728 The shmem is an internal filesystem used to manage shared memory. 728 The shmem is an internal filesystem used to manage shared memory.
729 It is backed by swap and manages resource limits. It is also exported 729 It is backed by swap and manages resource limits. It is also exported
730 to userspace as tmpfs if TMPFS is enabled. Disabling this 730 to userspace as tmpfs if TMPFS is enabled. Disabling this
731 option replaces shmem and tmpfs with the much simpler ramfs code, 731 option replaces shmem and tmpfs with the much simpler ramfs code,
732 which may be appropriate on small systems without swap. 732 which may be appropriate on small systems without swap.
733 733
734 config AIO 734 config AIO
735 bool "Enable AIO support" if EMBEDDED 735 bool "Enable AIO support" if EMBEDDED
736 default y 736 default y
737 help 737 help
738 This option enables POSIX asynchronous I/O which may by used 738 This option enables POSIX asynchronous I/O which may by used
739 by some high performance threaded applications. Disabling 739 by some high performance threaded applications. Disabling
740 this option saves about 7k. 740 this option saves about 7k.
741 741
742 config VM_EVENT_COUNTERS 742 config VM_EVENT_COUNTERS
743 default y 743 default y
744 bool "Enable VM event counters for /proc/vmstat" if EMBEDDED 744 bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
745 help 745 help
746 VM event counters are needed for event counts to be shown. 746 VM event counters are needed for event counts to be shown.
747 This option allows the disabling of the VM event counters 747 This option allows the disabling of the VM event counters
748 on EMBEDDED systems. /proc/vmstat will only show page counts 748 on EMBEDDED systems. /proc/vmstat will only show page counts
749 if VM event counters are disabled. 749 if VM event counters are disabled.
750 750
751 config PCI_QUIRKS 751 config PCI_QUIRKS
752 default y 752 default y
753 bool "Enable PCI quirk workarounds" if EMBEDDED 753 bool "Enable PCI quirk workarounds" if EMBEDDED
754 depends on PCI 754 depends on PCI
755 help 755 help
756 This enables workarounds for various PCI chipset 756 This enables workarounds for various PCI chipset
757 bugs/quirks. Disable this only if your target machine is 757 bugs/quirks. Disable this only if your target machine is
758 unaffected by PCI quirks. 758 unaffected by PCI quirks.
759 759
760 config SLUB_DEBUG 760 config SLUB_DEBUG
761 default y 761 default y
762 bool "Enable SLUB debugging support" if EMBEDDED 762 bool "Enable SLUB debugging support" if EMBEDDED
763 depends on SLUB && SYSFS 763 depends on SLUB && SYSFS
764 help 764 help
765 SLUB has extensive debug support features. Disabling these can 765 SLUB has extensive debug support features. Disabling these can
766 result in significant savings in code size. This also disables 766 result in significant savings in code size. This also disables
767 SLUB sysfs support. /sys/slab will not exist and there will be 767 SLUB sysfs support. /sys/slab will not exist and there will be
768 no support for cache validation etc. 768 no support for cache validation etc.
769 769
770 choice 770 choice
771 prompt "Choose SLAB allocator" 771 prompt "Choose SLAB allocator"
772 default SLUB 772 default SLUB
773 help 773 help
774 This option allows to select a slab allocator. 774 This option allows to select a slab allocator.
775 775
776 config SLAB 776 config SLAB
777 bool "SLAB" 777 bool "SLAB"
778 help 778 help
779 The regular slab allocator that is established and known to work 779 The regular slab allocator that is established and known to work
780 well in all environments. It organizes cache hot objects in 780 well in all environments. It organizes cache hot objects in
781 per cpu and per node queues. 781 per cpu and per node queues.
782 782
783 config SLUB 783 config SLUB
784 bool "SLUB (Unqueued Allocator)" 784 bool "SLUB (Unqueued Allocator)"
785 help 785 help
786 SLUB is a slab allocator that minimizes cache line usage 786 SLUB is a slab allocator that minimizes cache line usage
787 instead of managing queues of cached objects (SLAB approach). 787 instead of managing queues of cached objects (SLAB approach).
788 Per cpu caching is realized using slabs of objects instead 788 Per cpu caching is realized using slabs of objects instead
789 of queues of objects. SLUB can use memory efficiently 789 of queues of objects. SLUB can use memory efficiently
790 and has enhanced diagnostics. SLUB is the default choice for 790 and has enhanced diagnostics. SLUB is the default choice for
791 a slab allocator. 791 a slab allocator.
792 792
793 config SLOB 793 config SLOB
794 depends on EMBEDDED 794 depends on EMBEDDED
795 bool "SLOB (Simple Allocator)" 795 bool "SLOB (Simple Allocator)"
796 help 796 help
797 SLOB replaces the stock allocator with a drastically simpler 797 SLOB replaces the stock allocator with a drastically simpler
798 allocator. SLOB is generally more space efficient but 798 allocator. SLOB is generally more space efficient but
799 does not perform as well on large systems. 799 does not perform as well on large systems.
800 800
801 endchoice 801 endchoice
802 802
803 config PROFILING 803 config PROFILING
804 bool "Profiling support (EXPERIMENTAL)" 804 bool "Profiling support (EXPERIMENTAL)"
805 help 805 help
806 Say Y here to enable the extended profiling support mechanisms used 806 Say Y here to enable the extended profiling support mechanisms used
807 by profilers such as OProfile. 807 by profilers such as OProfile.
808 808
809 # 809 #
810 # Place an empty function call at each tracepoint site. Can be 810 # Place an empty function call at each tracepoint site. Can be
811 # dynamically changed for a probe function. 811 # dynamically changed for a probe function.
812 # 812 #
813 config TRACEPOINTS 813 config TRACEPOINTS
814 bool 814 bool
815 815
816 config MARKERS 816 config MARKERS
817 bool "Activate markers" 817 bool "Activate markers"
818 depends on TRACEPOINTS 818 depends on TRACEPOINTS
819 help 819 help
820 Place an empty function call at each marker site. Can be 820 Place an empty function call at each marker site. Can be
821 dynamically changed for a probe function. 821 dynamically changed for a probe function.
822 822
823 source "arch/Kconfig" 823 source "arch/Kconfig"
824 824
825 endmenu # General setup 825 endmenu # General setup
826 826
827 config HAVE_GENERIC_DMA_COHERENT 827 config HAVE_GENERIC_DMA_COHERENT
828 bool 828 bool
829 default n 829 default n
830 830
831 config SLABINFO 831 config SLABINFO
832 bool 832 bool
833 depends on PROC_FS 833 depends on PROC_FS
834 depends on SLAB || SLUB_DEBUG 834 depends on SLAB || SLUB_DEBUG
835 default y 835 default y
836 836
837 config RT_MUTEXES 837 config RT_MUTEXES
838 boolean 838 boolean
839 select PLIST 839 select PLIST
840 840
841 config TINY_SHMEM 841 config TINY_SHMEM
842 default !SHMEM 842 default !SHMEM
843 bool 843 bool
844 844
845 config BASE_SMALL 845 config BASE_SMALL
846 int 846 int
847 default 0 if BASE_FULL 847 default 0 if BASE_FULL
848 default 1 if !BASE_FULL 848 default 1 if !BASE_FULL
849 849
850 menuconfig MODULES 850 menuconfig MODULES
851 bool "Enable loadable module support" 851 bool "Enable loadable module support"
852 help 852 help
853 Kernel modules are small pieces of compiled code which can 853 Kernel modules are small pieces of compiled code which can
854 be inserted in the running kernel, rather than being 854 be inserted in the running kernel, rather than being
855 permanently built into the kernel. You use the "modprobe" 855 permanently built into the kernel. You use the "modprobe"
856 tool to add (and sometimes remove) them. If you say Y here, 856 tool to add (and sometimes remove) them. If you say Y here,
857 many parts of the kernel can be built as modules (by 857 many parts of the kernel can be built as modules (by
858 answering M instead of Y where indicated): this is most 858 answering M instead of Y where indicated): this is most
859 useful for infrequently used options which are not required 859 useful for infrequently used options which are not required
860 for booting. For more information, see the man pages for 860 for booting. For more information, see the man pages for
861 modprobe, lsmod, modinfo, insmod and rmmod. 861 modprobe, lsmod, modinfo, insmod and rmmod.
862 862
863 If you say Y here, you will need to run "make 863 If you say Y here, you will need to run "make
864 modules_install" to put the modules under /lib/modules/ 864 modules_install" to put the modules under /lib/modules/
865 where modprobe can find them (you may need to be root to do 865 where modprobe can find them (you may need to be root to do
866 this). 866 this).
867 867
868 If unsure, say Y. 868 If unsure, say Y.
869 869
870 if MODULES 870 if MODULES
871 871
872 config MODULE_FORCE_LOAD 872 config MODULE_FORCE_LOAD
873 bool "Forced module loading" 873 bool "Forced module loading"
874 default n 874 default n
875 help 875 help
876 Allow loading of modules without version information (ie. modprobe 876 Allow loading of modules without version information (ie. modprobe
877 --force). Forced module loading sets the 'F' (forced) taint flag and 877 --force). Forced module loading sets the 'F' (forced) taint flag and
878 is usually a really bad idea. 878 is usually a really bad idea.
879 879
880 config MODULE_UNLOAD 880 config MODULE_UNLOAD
881 bool "Module unloading" 881 bool "Module unloading"
882 help 882 help
883 Without this option you will not be able to unload any 883 Without this option you will not be able to unload any
884 modules (note that some modules may not be unloadable 884 modules (note that some modules may not be unloadable
885 anyway), which makes your kernel smaller, faster 885 anyway), which makes your kernel smaller, faster
886 and simpler. If unsure, say Y. 886 and simpler. If unsure, say Y.
887 887
888 config MODULE_FORCE_UNLOAD 888 config MODULE_FORCE_UNLOAD
889 bool "Forced module unloading" 889 bool "Forced module unloading"
890 depends on MODULE_UNLOAD && EXPERIMENTAL 890 depends on MODULE_UNLOAD && EXPERIMENTAL
891 help 891 help
892 This option allows you to force a module to unload, even if the 892 This option allows you to force a module to unload, even if the
893 kernel believes it is unsafe: the kernel will remove the module 893 kernel believes it is unsafe: the kernel will remove the module
894 without waiting for anyone to stop using it (using the -f option to 894 without waiting for anyone to stop using it (using the -f option to
895 rmmod). This is mainly for kernel developers and desperate users. 895 rmmod). This is mainly for kernel developers and desperate users.
896 If unsure, say N. 896 If unsure, say N.
897 897
898 config MODVERSIONS 898 config MODVERSIONS
899 bool "Module versioning support" 899 bool "Module versioning support"
900 help 900 help
901 Usually, you have to use modules compiled with your kernel. 901 Usually, you have to use modules compiled with your kernel.
902 Saying Y here makes it sometimes possible to use modules 902 Saying Y here makes it sometimes possible to use modules
903 compiled for different kernels, by adding enough information 903 compiled for different kernels, by adding enough information
904 to the modules to (hopefully) spot any changes which would 904 to the modules to (hopefully) spot any changes which would
905 make them incompatible with the kernel you are running. If 905 make them incompatible with the kernel you are running. If
906 unsure, say N. 906 unsure, say N.
907 907
908 config MODULE_SRCVERSION_ALL 908 config MODULE_SRCVERSION_ALL
909 bool "Source checksum for all modules" 909 bool "Source checksum for all modules"
910 help 910 help
911 Modules which contain a MODULE_VERSION get an extra "srcversion" 911 Modules which contain a MODULE_VERSION get an extra "srcversion"
912 field inserted into their modinfo section, which contains a 912 field inserted into their modinfo section, which contains a
913 sum of the source files which made it. This helps maintainers 913 sum of the source files which made it. This helps maintainers
914 see exactly which source was used to build a module (since 914 see exactly which source was used to build a module (since
915 others sometimes change the module source without updating 915 others sometimes change the module source without updating
916 the version). With this option, such a "srcversion" field 916 the version). With this option, such a "srcversion" field
917 will be created for all modules. If unsure, say N. 917 will be created for all modules. If unsure, say N.
918 918
919 config KMOD
920 def_bool y
921 help
922 This is being removed soon. These days, CONFIG_MODULES
923 implies CONFIG_KMOD, so use that instead.
924
925 endif # MODULES 919 endif # MODULES
926 920
927 config INIT_ALL_POSSIBLE 921 config INIT_ALL_POSSIBLE
928 bool 922 bool
929 help 923 help
930 Back when each arch used to define their own cpu_online_map and 924 Back when each arch used to define their own cpu_online_map and
931 cpu_possible_map, some of them chose to initialize cpu_possible_map 925 cpu_possible_map, some of them chose to initialize cpu_possible_map
932 with all 1s, and others with all 0s. When they were centralised, 926 with all 1s, and others with all 0s. When they were centralised,
933 it was better to provide this option than to break all the archs 927 it was better to provide this option than to break all the archs
934 and have several arch maintainers persuing me down dark alleys. 928 and have several arch maintainers persuing me down dark alleys.
935 929
936 config STOP_MACHINE 930 config STOP_MACHINE
937 bool 931 bool
938 default y 932 default y
939 depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU 933 depends on (SMP && MODULE_UNLOAD) || HOTPLUG_CPU
940 help 934 help
941 Need stop_machine() primitive. 935 Need stop_machine() primitive.
942 936
943 source "block/Kconfig" 937 source "block/Kconfig"
944 938
945 config PREEMPT_NOTIFIERS 939 config PREEMPT_NOTIFIERS
946 bool 940 bool
947 941
948 choice 942 choice
949 prompt "RCU Implementation" 943 prompt "RCU Implementation"
950 default CLASSIC_RCU 944 default CLASSIC_RCU
951 945
952 config CLASSIC_RCU 946 config CLASSIC_RCU
953 bool "Classic RCU" 947 bool "Classic RCU"
954 help 948 help
955 This option selects the classic RCU implementation that is 949 This option selects the classic RCU implementation that is
956 designed for best read-side performance on non-realtime 950 designed for best read-side performance on non-realtime
957 systems. 951 systems.
958 952
959 Select this option if you are unsure. 953 Select this option if you are unsure.
960 954
961 config TREE_RCU 955 config TREE_RCU
962 bool "Tree-based hierarchical RCU" 956 bool "Tree-based hierarchical RCU"
963 help 957 help
964 This option selects the RCU implementation that is 958 This option selects the RCU implementation that is
965 designed for very large SMP system with hundreds or 959 designed for very large SMP system with hundreds or
966 thousands of CPUs. 960 thousands of CPUs.
967 961
968 config PREEMPT_RCU 962 config PREEMPT_RCU
969 bool "Preemptible RCU" 963 bool "Preemptible RCU"
970 depends on PREEMPT 964 depends on PREEMPT
971 help 965 help
972 This option reduces the latency of the kernel by making certain 966 This option reduces the latency of the kernel by making certain
973 RCU sections preemptible. Normally RCU code is non-preemptible, if 967 RCU sections preemptible. Normally RCU code is non-preemptible, if
974 this option is selected then read-only RCU sections become 968 this option is selected then read-only RCU sections become
975 preemptible. This helps latency, but may expose bugs due to 969 preemptible. This helps latency, but may expose bugs due to
976 now-naive assumptions about each RCU read-side critical section 970 now-naive assumptions about each RCU read-side critical section
977 remaining on a given CPU through its execution. 971 remaining on a given CPU through its execution.
978 972
979 endchoice 973 endchoice
980 974
981 config RCU_TRACE 975 config RCU_TRACE
982 bool "Enable tracing for RCU" 976 bool "Enable tracing for RCU"
983 depends on TREE_RCU || PREEMPT_RCU 977 depends on TREE_RCU || PREEMPT_RCU
984 help 978 help
985 This option provides tracing in RCU which presents stats 979 This option provides tracing in RCU which presents stats
986 in debugfs for debugging RCU implementation. 980 in debugfs for debugging RCU implementation.
987 981
988 Say Y here if you want to enable RCU tracing 982 Say Y here if you want to enable RCU tracing
989 Say N if you are unsure. 983 Say N if you are unsure.
990 984
991 config RCU_FANOUT 985 config RCU_FANOUT
992 int "Tree-based hierarchical RCU fanout value" 986 int "Tree-based hierarchical RCU fanout value"
993 range 2 64 if 64BIT 987 range 2 64 if 64BIT
994 range 2 32 if !64BIT 988 range 2 32 if !64BIT
995 depends on TREE_RCU 989 depends on TREE_RCU
996 default 64 if 64BIT 990 default 64 if 64BIT
997 default 32 if !64BIT 991 default 32 if !64BIT
998 help 992 help
999 This option controls the fanout of hierarchical implementations 993 This option controls the fanout of hierarchical implementations
1000 of RCU, allowing RCU to work efficiently on machines with 994 of RCU, allowing RCU to work efficiently on machines with
1001 large numbers of CPUs. This value must be at least the cube 995 large numbers of CPUs. This value must be at least the cube
1002 root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit 996 root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
1003 systems and up to 262,144 for 64-bit systems. 997 systems and up to 262,144 for 64-bit systems.
1004 998
1005 Select a specific number if testing RCU itself. 999 Select a specific number if testing RCU itself.
1006 Take the default if unsure. 1000 Take the default if unsure.
1007 1001
1008 config RCU_FANOUT_EXACT 1002 config RCU_FANOUT_EXACT
1009 bool "Disable tree-based hierarchical RCU auto-balancing" 1003 bool "Disable tree-based hierarchical RCU auto-balancing"
1010 depends on TREE_RCU 1004 depends on TREE_RCU
1011 default n 1005 default n
1012 help 1006 help
1013 This option forces use of the exact RCU_FANOUT value specified, 1007 This option forces use of the exact RCU_FANOUT value specified,
1014 regardless of imbalances in the hierarchy. This is useful for 1008 regardless of imbalances in the hierarchy. This is useful for
1015 testing RCU itself, and might one day be useful on systems with 1009 testing RCU itself, and might one day be useful on systems with
1016 strong NUMA behavior. 1010 strong NUMA behavior.
1017 1011
1018 Without RCU_FANOUT_EXACT, the code will balance the hierarchy. 1012 Without RCU_FANOUT_EXACT, the code will balance the hierarchy.
1019 1013
1020 Say N if unsure. 1014 Say N if unsure.
1021 1015
1022 config TREE_RCU_TRACE 1016 config TREE_RCU_TRACE
1023 def_bool RCU_TRACE && TREE_RCU 1017 def_bool RCU_TRACE && TREE_RCU
1024 select DEBUG_FS 1018 select DEBUG_FS
1025 help 1019 help
1026 This option provides tracing for the TREE_RCU implementation, 1020 This option provides tracing for the TREE_RCU implementation,
1027 permitting Makefile to trivially select kernel/rcutree_trace.c. 1021 permitting Makefile to trivially select kernel/rcutree_trace.c.
1028 1022
1029 config PREEMPT_RCU_TRACE 1023 config PREEMPT_RCU_TRACE
1030 def_bool RCU_TRACE && PREEMPT_RCU 1024 def_bool RCU_TRACE && PREEMPT_RCU
1031 select DEBUG_FS 1025 select DEBUG_FS
1032 help 1026 help
1033 This option provides tracing for the PREEMPT_RCU implementation, 1027 This option provides tracing for the PREEMPT_RCU implementation,
1034 permitting Makefile to trivially select kernel/rcupreempt_trace.c. 1028 permitting Makefile to trivially select kernel/rcupreempt_trace.c.
1035 1029