26 May, 2010
1 commit
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The commit 00b7c3395aec3df43de5bd02a3c5a099ca51169f
"sysctl: refactor integer handling proc code"
modified the behaviour of writing to /proc.
Before the commit, write("1\n") to /proc/sys/kernel/printk succeeded. But
now it returns EINVAL.This commit supports writing a single value to a multi-valued entry.
Signed-off-by: J. R. Okajima
Reviewed-and-tested-by: WANG Cong
Signed-off-by: David S. Miller
21 May, 2010
2 commits
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1674 commits)
qlcnic: adding co maintainer
ixgbe: add support for active DA cables
ixgbe: dcb, do not tag tc_prio_control frames
ixgbe: fix ixgbe_tx_is_paused logic
ixgbe: always enable vlan strip/insert when DCB is enabled
ixgbe: remove some redundant code in setting FCoE FIP filter
ixgbe: fix wrong offset to fc_frame_header in ixgbe_fcoe_ddp
ixgbe: fix header len when unsplit packet overflows to data buffer
ipv6: Never schedule DAD timer on dead address
ipv6: Use POSTDAD state
ipv6: Use state_lock to protect ifa state
ipv6: Replace inet6_ifaddr->dead with state
cxgb4: notify upper drivers if the device is already up when they load
cxgb4: keep interrupts available when the ports are brought down
cxgb4: fix initial addition of MAC address
cnic: Return SPQ credit to bnx2x after ring setup and shutdown.
cnic: Convert cnic_local_flags to atomic ops.
can: Fix SJA1000 command register writes on SMP systems
bridge: fix build for CONFIG_SYSFS disabled
ARCNET: Limit com20020 PCI ID matches for SOHARD cards
...Fix up various conflicts with pcmcia tree drivers/net/
{pcmcia/3c589_cs.c, wireless/orinoco/orinoco_cs.c and
wireless/orinoco/spectrum_cs.c} and feature removal
(Documentation/feature-removal-schedule.txt).Also fix a non-content conflict due to pm_qos_requirement getting
renamed in the PM tree (now pm_qos_request) in net/mac80211/scan.c -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (40 commits)
Input: psmouse - small formatting changes to better follow coding style
Input: synaptics - set dimensions as reported by firmware
Input: elantech - relax signature checks
Input: elantech - enforce common prefix on messages
Input: wistron_btns - switch to using kmemdup()
Input: usbtouchscreen - switch to using kmemdup()
Input: do not force selecting i8042 on Moorestown
Input: Documentation/sysrq.txt - update KEY_SYSRQ info
Input: 88pm860x_onkey - remove invalid irq number assignment
Input: i8042 - add a PNP entry to the aux device list
Input: i8042 - add some extra PNP keyboard types
Input: wm9712 - fix wm97xx_set_gpio() logic
Input: add keypad driver for keys interfaced to TCA6416
Input: remove obsolete {corgi,spitz,tosa}kbd.c
Input: kbtab - do not advertise unsupported events
Input: kbtab - simplify kbtab_disconnect()
Input: kbtab - fix incorrect size parameter in usb_buffer_free
Input: acecad - don't advertise mouse events
Input: acecad - fix some formatting issues
Input: acecad - simplify usb_acecad_disconnect()
...Trivial conflict in Documentation/feature-removal-schedule.txt
17 May, 2010
1 commit
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The exception-trace facility on x86 and other architectures prints
traces to dmesg whenever a user space application crashes.
s390 has such a feature since ages however it is called
userprocess_debug and is enabled differently.
This patch makes sure that whenever one of the two procfs files/proc/sys/kernel/userprocess_debug
/proc/sys/debug/exception-traceis modified the contents of the second one changes as well.
That way we keep backwards compatibilty but also support the same
interface like other architectures do.
Besides that the output of the traces is improved since it will now
also contain the corresponding filename of the vma (when available)
where the process caused a fault or trap.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
16 May, 2010
2 commits
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The new function can be used to read/write large bitmaps via /proc. A
comma separated range format is used for compact output and input
(e.g. 1,3-4,10-10).Writing into the file will first reset the bitmap then update it
based on the given input.Signed-off-by: Octavian Purdila
Signed-off-by: WANG Cong
Cc: Eric W. Biederman
Signed-off-by: David S. Miller -
(Based on Octavian's work, and I modified a lot.)
As we are about to add another integer handling proc function a little
bit of cleanup is in order: add a few helper functions to improve code
readability and decrease code duplication.In the process a bug is also fixed: if the user specifies a number
with more then 20 digits it will be interpreted as two integers
(e.g. 10000...13 will be interpreted as 100.... and 13).Behavior for EFAULT handling was changed as well. Previous to this
patch, when an EFAULT error occurred in the middle of a write
operation, although some of the elements were set, that was not
acknowledged to the user (by shorting the write and returning the
number of bytes accepted). EFAULT is now treated just like any other
errors by acknowledging the amount of bytes accepted.Signed-off-by: Octavian Purdila
Signed-off-by: WANG Cong
Cc: Eric W. Biederman
Signed-off-by: David S. Miller
14 Apr, 2010
1 commit
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Instead of keeping SysRq support inside of legacy keyboard driver split
it out into a separate input handler (filter). This stops most SysRq input
events from leaking into evdev clients (some events, such as first SysRq
scancode - not keycode - event, are still leaked into both legacy keyboard
and evdev).[martinez.javier@gmail.com: fix compile error when CONFIG_MAGIC_SYSRQ is
not defined]
Signed-off-by: Dmitry Torokhov
13 Mar, 2010
8 commits
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Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move lockdep extern declarations to linux/lockdep.h
Signed-off-by: Dave Young
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move max_lock_depth extern declaration to linux/rtmutex.h
Signed-off-by: Dave Young
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move acct_parm extern declaration to linux/acct.h
Signed-off-by: Dave Young
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move sg_big_buff extern declaration to scsi/sg.h
Signed-off-by: Dave Young
Acked-by: Doug Gilbert
Cc: James Bottomley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move modprobe_path extern declaration to linux/kmod.h
Move modules_disabled extern declaration to linux/module.hSigned-off-by: Dave Young
Cc: Rusty Russell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move rcutorture_runnable extern declaration to linux/rcupdate.h
Signed-off-by: Dave Young
Acked-by: Josh Triplett
Reviewed-by: "Paul E. McKenney"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move print_fatal_signals extern declaration to linux/signal.h
Signed-off-by: Dave Young
Cc: Oleg Nesterov
Cc: Roland McGrath
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Extern declarations in sysctl.c should be moved to their own header file,
and then include them in relavant .c files.Move C_A_D extern variable declaration to linux/reboot.h
Signed-off-by: Dave Young
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Mar, 2010
1 commit
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…nel/git/tip/linux-2.6-tip
* 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Issue at least one memory barrier in stop_machine_text_poke()
perf probe: Correct probe syntax on command line help
perf probe: Add lazy line matching support
perf probe: Show more lines after last line
perf probe: Check function address range strictly in line finder
perf probe: Use libdw callback routines
perf probe: Use elfutils-libdw for analyzing debuginfo
perf probe: Rename probe finder functions
perf probe: Fix bugs in line range finder
perf probe: Update perf probe document
perf probe: Do not show --line option without dwarf support
kprobes: Add documents of jump optimization
kprobes/x86: Support kprobes jump optimization on x86
x86: Add text_poke_smp for SMP cross modifying code
kprobes/x86: Cleanup save/restore registers
kprobes/x86: Boost probes when reentering
kprobes: Jump optimization sysctl interface
kprobes: Introduce kprobes jump optimization
kprobes: Introduce generic insn_slot framework
kprobes/x86: Cleanup RELATIVEJUMP_INSTRUCTION to RELATIVEJUMP_OPCODE
01 Mar, 2010
1 commit
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Just faults right now, will add other traps later.
Signed-off-by: David S. Miller
26 Feb, 2010
1 commit
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Add /proc/sys/debug/kprobes-optimization sysctl which enables
and disables kprobes jump optimization on the fly for debugging.Changes in v7:
- Remove ctl_name = CTL_UNNUMBERED for upstream compatibility.Changes in v6:
- Update comments and coding style.Signed-off-by: Masami Hiramatsu
Cc: systemtap
Cc: DLE
Cc: Ananth N Mavinakayanahalli
Cc: Jim Keniston
Cc: Srikar Dronamraju
Cc: Christoph Hellwig
Cc: Steven Rostedt
Cc: Frederic Weisbecker
Cc: Anders Kaseorg
Cc: Tim Abbott
Cc: Andi Kleen
Cc: Jason Baron
Cc: Mathieu Desnoyers
Cc: Frederic Weisbecker
Cc: Ananth N Mavinakayanahalli
LKML-Reference:
Signed-off-by: Ingo Molnar
18 Dec, 2009
2 commits
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…s/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
Keys: KEYCTL_SESSION_TO_PARENT needs TIF_NOTIFY_RESUME architecture support
NOMMU: Optimise away the {dac_,}mmap_min_addr tests
security/min_addr.c: make init_mmap_min_addr() static
keys: PTR_ERR return of wrong pointer in keyctl_get_security() -
It is a mistake that we used 'proc_dointvec', it should be
'proc_dointvec_minmax', as in the original patch.Signed-off-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Dec, 2009
1 commit
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In NOMMU mode clamp dac_mmap_min_addr to zero to cause the tests on it to be
skipped by the compiler. We do this as the minimum mmap address doesn't make
any sense in NOMMU mode.mmap_min_addr and round_hint_to_min() can be discarded entirely in NOMMU mode.
Signed-off-by: David Howells
Acked-by: Eric Paris
Signed-off-by: James Morris
16 Dec, 2009
2 commits
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Jan Engelhardt reported we have this problem:
setting max_map_count to a value large enough results in programs dying at
first try. This is on 2.6.31.6:15:59 borg:/proc/sys/vm # echo $[1<max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
1073741824
15:59 borg:/proc/sys/vm # echo $[1<max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
KilledThis is because we have a chance to make 'max_map_count' negative. but
it's meaningless. Make it only accept non-negative values.Reported-by: Jan Engelhardt
Signed-off-by: WANG Cong
Cc: Ingo Molnar
Cc: Peter Zijlstra
Cc: James Morris
Cc: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch derives a "nodes_allowed" node mask from the numa mempolicy of
the task modifying the number of persistent huge pages to control the
allocation, freeing and adjusting of surplus huge pages when the pool page
count is modified via the new sysctl or sysfs attribute
"nr_hugepages_mempolicy". The nodes_allowed mask is derived as follows:* For "default" [NULL] task mempolicy, a NULL nodemask_t pointer
is produced. This will cause the hugetlb subsystem to use
node_online_map as the "nodes_allowed". This preserves the
behavior before this patch.
* For "preferred" mempolicy, including explicit local allocation,
a nodemask with the single preferred node will be produced.
"local" policy will NOT track any internode migrations of the
task adjusting nr_hugepages.
* For "bind" and "interleave" policy, the mempolicy's nodemask
will be used.
* Other than to inform the construction of the nodes_allowed node
mask, the actual mempolicy mode is ignored. That is, all modes
behave like interleave over the resulting nodes_allowed mask
with no "fallback".See the updated documentation [next patch] for more information
about the implications of this patch.Examples:
Starting with:
Node 0 HugePages_Total: 0
Node 1 HugePages_Total: 0
Node 2 HugePages_Total: 0
Node 3 HugePages_Total: 0Default behavior [with or without this patch] balances persistent
hugepage allocation across nodes [with sufficient contiguous memory]:sysctl vm.nr_hugepages[_mempolicy]=32
yields:
Node 0 HugePages_Total: 8
Node 1 HugePages_Total: 8
Node 2 HugePages_Total: 8
Node 3 HugePages_Total: 8Of course, we only have nr_hugepages_mempolicy with the patch,
but with default mempolicy, nr_hugepages_mempolicy behaves the
same as nr_hugepages.Applying mempolicy--e.g., with numactl [using '-m' a.k.a.
'--membind' because it allows multiple nodes to be specified
and it's easy to type]--we can allocate huge pages on
individual nodes or sets of nodes. So, starting from the
condition above, with 8 huge pages per node, add 8 more to
node 2 using:numactl -m 2 sysctl vm.nr_hugepages_mempolicy=40
This yields:
Node 0 HugePages_Total: 8
Node 1 HugePages_Total: 8
Node 2 HugePages_Total: 16
Node 3 HugePages_Total: 8The incremental 8 huge pages were restricted to node 2 by the
specified mempolicy.Similarly, we can use mempolicy to free persistent huge pages
from specified nodes:numactl -m 0,1 sysctl vm.nr_hugepages_mempolicy=32
yields:
Node 0 HugePages_Total: 4
Node 1 HugePages_Total: 4
Node 2 HugePages_Total: 16
Node 3 HugePages_Total: 8The 8 huge pages freed were balanced over nodes 0 and 1.
[rientjes@google.com: accomodate reworked NODEMASK_ALLOC]
Signed-off-by: David Rientjes
Signed-off-by: Lee Schermerhorn
Acked-by: Mel Gorman
Reviewed-by: Andi Kleen
Cc: KAMEZAWA Hiroyuki
Cc: Randy Dunlap
Cc: Nishanth Aravamudan
Cc: Adam Litke
Cc: Andy Whitcroft
Cc: Eric Whitney
Cc: Christoph Lameter
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Dec, 2009
1 commit
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…l/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (21 commits)
sched: Remove forced2_migrations stats
sched: Fix memory leak in two error corner cases
sched: Fix build warning in get_update_sysctl_factor()
sched: Update normalized values on user updates via proc
sched: Make tunable scaling style configurable
sched: Fix missing sched tunable recalculation on cpu add/remove
sched: Fix task priority bug
sched: cgroup: Implement different treatment for idle shares
sched: Remove unnecessary RCU exclusion
sched: Discard some old bits
sched: Clean up check_preempt_wakeup()
sched: Move update_curr() in check_preempt_wakeup() to avoid redundant call
sched: Sanitize fork() handling
sched: Clean up ttwu() rq locking
sched: Remove rq->clock coupling from set_task_cpu()
sched: Consolidate select_task_rq() callers
sched: Remove sysctl.sched_features
sched: Protect sched_rr_get_param() access to task->sched_class
sched: Protect task->cpus_allowed access in sched_getaffinity()
sched: Fix balance vs hotplug race
...Fixed up conflicts in kernel/sysctl.c (due to sysctl cleanup)
09 Dec, 2009
3 commits
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The normalized values are also recalculated in case the scaling factor
changes.This patch updates the internally used scheduler tuning values that are
normalized to one cpu in case a user sets new values via sysfs.Together with patch 2 of this series this allows to let user configured
values scale (or not) to cpu add/remove events taking place later.Signed-off-by: Christian Ehrhardt
Signed-off-by: Peter Zijlstra
LKML-Reference:
[ v2: fix warning ]
Signed-off-by: Ingo Molnar -
As scaling now takes place on all kind of cpu add/remove events a user
that configures values via proc should be able to configure if his set
values are still rescaled or kept whatever happens.As the comments state that log2 was just a second guess that worked the
interface is not just designed for on/off, but to choose a scaling type.
Currently this allows none, log and linear, but more important it allwos
us to keep the interface even if someone has an even better idea how to
scale the values.Signed-off-by: Christian Ehrhardt
Signed-off-by: Peter Zijlstra
LKML-Reference:
Signed-off-by: Ingo Molnar -
Since we've had a much saner debugfs interface to this, remove the
sysctl one.Signed-off-by: Peter Zijlstra
LKML-Reference:
[ v2: build fix ]
Signed-off-by: Ingo Molnar
08 Dec, 2009
1 commit
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* git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6: (43 commits)
security/tomoyo: Remove now unnecessary handling of security_sysctl.
security/tomoyo: Add a special case to handle accesses through the internal proc mount.
sysctl: Drop & in front of every proc_handler.
sysctl: Remove CTL_NONE and CTL_UNNUMBERED
sysctl: kill dead ctl_handler definitions.
sysctl: Remove the last of the generic binary sysctl support
sysctl net: Remove unused binary sysctl code
sysctl security/tomoyo: Don't look at ctl_name
sysctl arm: Remove binary sysctl support
sysctl x86: Remove dead binary sysctl support
sysctl sh: Remove dead binary sysctl support
sysctl powerpc: Remove dead binary sysctl support
sysctl ia64: Remove dead binary sysctl support
sysctl s390: Remove dead sysctl binary support
sysctl frv: Remove dead binary sysctl support
sysctl mips/lasat: Remove dead binary sysctl support
sysctl drivers: Remove dead binary sysctl support
sysctl crypto: Remove dead binary sysctl support
sysctl security/keys: Remove dead binary sysctl support
sysctl kernel: Remove binary sysctl logic
...
06 Dec, 2009
1 commit
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…l/git/tip/linux-2.6-tip
* 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
ratelimit: Make suppressed output messages more useful
printk: Remove ratelimit.h from kernel.h
ratelimit: Fix/allow use in atomic contexts
ratelimit: Use per ratelimit context locking
19 Nov, 2009
1 commit
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For consistency drop & in front of every proc_handler. Explicity
taking the address is unnecessary and it prevents optimizations
like stubbing the proc_handlers to NULL.Cc: Alexey Dobriyan
Cc: Ingo Molnar
Cc: Joe Perches
Signed-off-by: Eric W. Biederman
12 Nov, 2009
1 commit
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Now that all of the users stopped using ctl_name and strategy it
is safe to remove the fields from struct ctl_table, and it is safe
to remove the stub strategy routines as well.Signed-off-by: Eric W. Biederman
11 Nov, 2009
3 commits
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The ctl_name and strategy fields are unused, now that sys_sysctl
is a compatibility wrapper around /proc/sys. No longer looking
at them in the generic code is effectively what we are doing
now and provides the guarantee that during further cleanups
we can just remove references to those fields and everything
will work ok.Signed-off-by: Eric W. Biederman
-
Now that sys_sysctl is a generic wrapper around /proc/sys .ctl_name
and .strategy members of sysctl tables are dead code. Remove them.Signed-off-by: Eric W. Biederman
-
Now that sys_sysctl is a compatibility layer on top of /proc/sys
these routines are never called but are still put in sysctl
tables so I have reduced them to stubs until they can be
removed entirely.Signed-off-by: Eric W. Biederman
06 Nov, 2009
1 commit
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In preparation for more invasive cleanups separate the core
binary sysctl logic into it's own file.Signed-off-by: Eric W. Biederman
24 Sep, 2009
4 commits
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* 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits)
HWPOISON: Enable error_remove_page on btrfs
HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs
HWPOISON: Add madvise() based injector for hardware poisoned pages v4
HWPOISON: Enable error_remove_page for NFS
HWPOISON: Enable .remove_error_page for migration aware file systems
HWPOISON: The high level memory error handler in the VM v7
HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process
HWPOISON: shmem: call set_page_dirty() with locked page
HWPOISON: Define a new error_remove_page address space op for async truncation
HWPOISON: Add invalidate_inode_page
HWPOISON: Refactor truncate to allow direct truncating of page v2
HWPOISON: check and isolate corrupted free pages v2
HWPOISON: Handle hardware poisoned pages in try_to_unmap
HWPOISON: Use bitmask/action code for try_to_unmap behaviour
HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2
HWPOISON: Add poison check to page fault handling
HWPOISON: Add basic support for poisoned pages in fault handler v3
HWPOISON: Add new SIGBUS error codes for hardware poison signals
HWPOISON: Add support for poison swap entries v2
HWPOISON: Export some rmap vma locking to outside world
... -
It's unused.
It isn't needed -- read or write flag is already passed and sysctl
shouldn't care about the rest.It _was_ used in two places at arch/frv for some reason.
Signed-off-by: Alexey Dobriyan
Cc: David Howells
Cc: "Eric W. Biederman"
Cc: Al Viro
Cc: Ralf Baechle
Cc: Martin Schwidefsky
Cc: Ingo Molnar
Cc: "David S. Miller"
Cc: James Morris
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce core pipe limiting sysctl.
Since we can dump cores to pipe, rather than directly to the filesystem,
we create a condition in which a user can create a very high load on the
system simply by running bad applications.If the pipe reader specified in core_pattern is poorly written, we can
have lots of ourstandig resources and processes in the system.This sysctl introduces an ability to limit that resource consumption.
core_pipe_limit defines how many in-flight dumps may be run in parallel,
dumps beyond this value are skipped and a note is made in the kernel log.
A special value of 0 in core_pipe_limit denotes unlimited core dumps may
be handled (this is the default value).[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Neil Horman
Reported-by: Earl Chew
Cc: Oleg Nesterov
Cc: Andi Kleen
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* remove asm/atomic.h inclusion from linux/utsname.h --
not needed after kref conversion
* remove linux/utsname.h inclusion from files which do not need itNOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however
due to some personality stuff it _is_ needed -- cowardly leave ELF-related
headers and files alone.Signed-off-by: Alexey Dobriyan
Signed-off-by: Linus Torvalds
23 Sep, 2009
1 commit
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When syslog is not possible, at the same time there's no serial/net
console available, it will be hard to read the printk messages. For
example oops/panic/warning messages in shutdown phase.Add a printk delay feature, we can make each printk message delay some
milliseconds.Setting the delay by proc/sysctl interface: /proc/sys/kernel/printk_delay
The value range from 0 - 10000, default value is 0
[akpm@linux-foundation.org: fix a few things]
Signed-off-by: Dave Young
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds