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Commit 0acba3cd018c51e529a6f008c092629ad2e9e0a4

Authored by Satoru Takeuchi
Committed by Ben Myers
1 parent 0e446be448
Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga

xfs: Remove the description of nodelaylog mount option from xfs.txt 

nodelaylog mount option is removed by commit 93b8a585. But there still be
the description about it in the xfs document. This patch removes it.

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

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

Documentation/filesystems/xfs.txt
Diff comments   View file @ 0acba3c
1 1
2 The SGI XFS Filesystem 2 The SGI XFS Filesystem
3 ====================== 3 ======================
4 4
5 XFS is a high performance journaling filesystem which originated 5 XFS is a high performance journaling filesystem which originated
6 on the SGI IRIX platform. It is completely multi-threaded, can 6 on the SGI IRIX platform. It is completely multi-threaded, can
7 support large files and large filesystems, extended attributes, 7 support large files and large filesystems, extended attributes,
8 variable block sizes, is extent based, and makes extensive use of 8 variable block sizes, is extent based, and makes extensive use of
9 Btrees (directories, extents, free space) to aid both performance 9 Btrees (directories, extents, free space) to aid both performance
10 and scalability. 10 and scalability.
11 11
12 Refer to the documentation at http://oss.sgi.com/projects/xfs/ 12 Refer to the documentation at http://oss.sgi.com/projects/xfs/
13 for further details. This implementation is on-disk compatible 13 for further details. This implementation is on-disk compatible
14 with the IRIX version of XFS. 14 with the IRIX version of XFS.
15 15
16 16
17 Mount Options 17 Mount Options
18 ============= 18 =============
19 19
20 When mounting an XFS filesystem, the following options are accepted. 20 When mounting an XFS filesystem, the following options are accepted.
21 21
22 allocsize=size 22 allocsize=size
23 Sets the buffered I/O end-of-file preallocation size when 23 Sets the buffered I/O end-of-file preallocation size when
24 doing delayed allocation writeout (default size is 64KiB). 24 doing delayed allocation writeout (default size is 64KiB).
25 Valid values for this option are page size (typically 4KiB) 25 Valid values for this option are page size (typically 4KiB)
26 through to 1GiB, inclusive, in power-of-2 increments. 26 through to 1GiB, inclusive, in power-of-2 increments.
27 27
28 attr2/noattr2 28 attr2/noattr2
29 The options enable/disable (default is disabled for backward 29 The options enable/disable (default is disabled for backward
30 compatibility on-disk) an "opportunistic" improvement to be 30 compatibility on-disk) an "opportunistic" improvement to be
31 made in the way inline extended attributes are stored on-disk. 31 made in the way inline extended attributes are stored on-disk.
32 When the new form is used for the first time (by setting or 32 When the new form is used for the first time (by setting or
33 removing extended attributes) the on-disk superblock feature 33 removing extended attributes) the on-disk superblock feature
34 bit field will be updated to reflect this format being in use. 34 bit field will be updated to reflect this format being in use.
35 35
36 barrier 36 barrier
37 Enables the use of block layer write barriers for writes into 37 Enables the use of block layer write barriers for writes into
38 the journal and unwritten extent conversion. This allows for 38 the journal and unwritten extent conversion. This allows for
39 drive level write caching to be enabled, for devices that 39 drive level write caching to be enabled, for devices that
40 support write barriers. 40 support write barriers.
41 41
42 discard 42 discard
43 Issue command to let the block device reclaim space freed by the 43 Issue command to let the block device reclaim space freed by the
44 filesystem. This is useful for SSD devices, thinly provisioned 44 filesystem. This is useful for SSD devices, thinly provisioned
45 LUNs and virtual machine images, but may have a performance 45 LUNs and virtual machine images, but may have a performance
46 impact. This option is incompatible with the nodelaylog option. 46 impact.
47 47
48 dmapi 48 dmapi
49 Enable the DMAPI (Data Management API) event callouts. 49 Enable the DMAPI (Data Management API) event callouts.
50 Use with the "mtpt" option. 50 Use with the "mtpt" option.
51 51
52 grpid/bsdgroups and nogrpid/sysvgroups 52 grpid/bsdgroups and nogrpid/sysvgroups
53 These options define what group ID a newly created file gets. 53 These options define what group ID a newly created file gets.
54 When grpid is set, it takes the group ID of the directory in 54 When grpid is set, it takes the group ID of the directory in
55 which it is created; otherwise (the default) it takes the fsgid 55 which it is created; otherwise (the default) it takes the fsgid
56 of the current process, unless the directory has the setgid bit 56 of the current process, unless the directory has the setgid bit
57 set, in which case it takes the gid from the parent directory, 57 set, in which case it takes the gid from the parent directory,
58 and also gets the setgid bit set if it is a directory itself. 58 and also gets the setgid bit set if it is a directory itself.
59 59
60 ihashsize=value 60 ihashsize=value
61 In memory inode hashes have been removed, so this option has 61 In memory inode hashes have been removed, so this option has
62 no function as of August 2007. Option is deprecated. 62 no function as of August 2007. Option is deprecated.
63 63
64 ikeep/noikeep 64 ikeep/noikeep
65 When ikeep is specified, XFS does not delete empty inode clusters 65 When ikeep is specified, XFS does not delete empty inode clusters
66 and keeps them around on disk. ikeep is the traditional XFS 66 and keeps them around on disk. ikeep is the traditional XFS
67 behaviour. When noikeep is specified, empty inode clusters 67 behaviour. When noikeep is specified, empty inode clusters
68 are returned to the free space pool. The default is noikeep for 68 are returned to the free space pool. The default is noikeep for
69 non-DMAPI mounts, while ikeep is the default when DMAPI is in use. 69 non-DMAPI mounts, while ikeep is the default when DMAPI is in use.
70 70
71 inode64 71 inode64
72 Indicates that XFS is allowed to create inodes at any location 72 Indicates that XFS is allowed to create inodes at any location
73 in the filesystem, including those which will result in inode 73 in the filesystem, including those which will result in inode
74 numbers occupying more than 32 bits of significance. This is 74 numbers occupying more than 32 bits of significance. This is
75 the default allocation option. Applications which do not handle 75 the default allocation option. Applications which do not handle
76 inode numbers bigger than 32 bits, should use inode32 option. 76 inode numbers bigger than 32 bits, should use inode32 option.
77 77
78 inode32 78 inode32
79 Indicates that XFS is limited to create inodes at locations which 79 Indicates that XFS is limited to create inodes at locations which
80 will not result in inode numbers with more than 32 bits of 80 will not result in inode numbers with more than 32 bits of
81 significance. This is provided for backwards compatibility, since 81 significance. This is provided for backwards compatibility, since
82 64 bits inode numbers might cause problems for some applications 82 64 bits inode numbers might cause problems for some applications
83 that cannot handle large inode numbers. 83 that cannot handle large inode numbers.
84 84
85 largeio/nolargeio 85 largeio/nolargeio
86 If "nolargeio" is specified, the optimal I/O reported in 86 If "nolargeio" is specified, the optimal I/O reported in
87 st_blksize by stat(2) will be as small as possible to allow user 87 st_blksize by stat(2) will be as small as possible to allow user
88 applications to avoid inefficient read/modify/write I/O. 88 applications to avoid inefficient read/modify/write I/O.
89 If "largeio" specified, a filesystem that has a "swidth" specified 89 If "largeio" specified, a filesystem that has a "swidth" specified
90 will return the "swidth" value (in bytes) in st_blksize. If the 90 will return the "swidth" value (in bytes) in st_blksize. If the
91 filesystem does not have a "swidth" specified but does specify 91 filesystem does not have a "swidth" specified but does specify
92 an "allocsize" then "allocsize" (in bytes) will be returned 92 an "allocsize" then "allocsize" (in bytes) will be returned
93 instead. 93 instead.
94 If neither of these two options are specified, then filesystem 94 If neither of these two options are specified, then filesystem
95 will behave as if "nolargeio" was specified. 95 will behave as if "nolargeio" was specified.
96 96
97 logbufs=value 97 logbufs=value
98 Set the number of in-memory log buffers. Valid numbers range 98 Set the number of in-memory log buffers. Valid numbers range
99 from 2-8 inclusive. 99 from 2-8 inclusive.
100 The default value is 8 buffers for filesystems with a 100 The default value is 8 buffers for filesystems with a
101 blocksize of 64KiB, 4 buffers for filesystems with a blocksize 101 blocksize of 64KiB, 4 buffers for filesystems with a blocksize
102 of 32KiB, 3 buffers for filesystems with a blocksize of 16KiB 102 of 32KiB, 3 buffers for filesystems with a blocksize of 16KiB
103 and 2 buffers for all other configurations. Increasing the 103 and 2 buffers for all other configurations. Increasing the
104 number of buffers may increase performance on some workloads 104 number of buffers may increase performance on some workloads
105 at the cost of the memory used for the additional log buffers 105 at the cost of the memory used for the additional log buffers
106 and their associated control structures. 106 and their associated control structures.
107 107
108 logbsize=value 108 logbsize=value
109 Set the size of each in-memory log buffer. 109 Set the size of each in-memory log buffer.
110 Size may be specified in bytes, or in kilobytes with a "k" suffix. 110 Size may be specified in bytes, or in kilobytes with a "k" suffix.
111 Valid sizes for version 1 and version 2 logs are 16384 (16k) and 111 Valid sizes for version 1 and version 2 logs are 16384 (16k) and
112 32768 (32k). Valid sizes for version 2 logs also include 112 32768 (32k). Valid sizes for version 2 logs also include
113 65536 (64k), 131072 (128k) and 262144 (256k). 113 65536 (64k), 131072 (128k) and 262144 (256k).
114 The default value for machines with more than 32MiB of memory 114 The default value for machines with more than 32MiB of memory
115 is 32768, machines with less memory use 16384 by default. 115 is 32768, machines with less memory use 16384 by default.
116 116
117 logdev=device and rtdev=device 117 logdev=device and rtdev=device
118 Use an external log (metadata journal) and/or real-time device. 118 Use an external log (metadata journal) and/or real-time device.
119 An XFS filesystem has up to three parts: a data section, a log 119 An XFS filesystem has up to three parts: a data section, a log
120 section, and a real-time section. The real-time section is 120 section, and a real-time section. The real-time section is
121 optional, and the log section can be separate from the data 121 optional, and the log section can be separate from the data
122 section or contained within it. 122 section or contained within it.
123 123
124 mtpt=mountpoint 124 mtpt=mountpoint
125 Use with the "dmapi" option. The value specified here will be 125 Use with the "dmapi" option. The value specified here will be
126 included in the DMAPI mount event, and should be the path of 126 included in the DMAPI mount event, and should be the path of
127 the actual mountpoint that is used. 127 the actual mountpoint that is used.
128 128
129 noalign 129 noalign
130 Data allocations will not be aligned at stripe unit boundaries. 130 Data allocations will not be aligned at stripe unit boundaries.
131 131
132 noatime 132 noatime
133 Access timestamps are not updated when a file is read. 133 Access timestamps are not updated when a file is read.
134 134
135 norecovery 135 norecovery
136 The filesystem will be mounted without running log recovery. 136 The filesystem will be mounted without running log recovery.
137 If the filesystem was not cleanly unmounted, it is likely to 137 If the filesystem was not cleanly unmounted, it is likely to
138 be inconsistent when mounted in "norecovery" mode. 138 be inconsistent when mounted in "norecovery" mode.
139 Some files or directories may not be accessible because of this. 139 Some files or directories may not be accessible because of this.
140 Filesystems mounted "norecovery" must be mounted read-only or 140 Filesystems mounted "norecovery" must be mounted read-only or
141 the mount will fail. 141 the mount will fail.
142 142
143 nouuid 143 nouuid
144 Don't check for double mounted file systems using the file system uuid. 144 Don't check for double mounted file systems using the file system uuid.
145 This is useful to mount LVM snapshot volumes. 145 This is useful to mount LVM snapshot volumes.
146 146
147 uquota/usrquota/uqnoenforce/quota 147 uquota/usrquota/uqnoenforce/quota
148 User disk quota accounting enabled, and limits (optionally) 148 User disk quota accounting enabled, and limits (optionally)
149 enforced. Refer to xfs_quota(8) for further details. 149 enforced. Refer to xfs_quota(8) for further details.
150 150
151 gquota/grpquota/gqnoenforce 151 gquota/grpquota/gqnoenforce
152 Group disk quota accounting enabled and limits (optionally) 152 Group disk quota accounting enabled and limits (optionally)
153 enforced. Refer to xfs_quota(8) for further details. 153 enforced. Refer to xfs_quota(8) for further details.
154 154
155 pquota/prjquota/pqnoenforce 155 pquota/prjquota/pqnoenforce
156 Project disk quota accounting enabled and limits (optionally) 156 Project disk quota accounting enabled and limits (optionally)
157 enforced. Refer to xfs_quota(8) for further details. 157 enforced. Refer to xfs_quota(8) for further details.
158 158
159 sunit=value and swidth=value 159 sunit=value and swidth=value
160 Used to specify the stripe unit and width for a RAID device or 160 Used to specify the stripe unit and width for a RAID device or
161 a stripe volume. "value" must be specified in 512-byte block 161 a stripe volume. "value" must be specified in 512-byte block
162 units. 162 units.
163 If this option is not specified and the filesystem was made on 163 If this option is not specified and the filesystem was made on
164 a stripe volume or the stripe width or unit were specified for 164 a stripe volume or the stripe width or unit were specified for
165 the RAID device at mkfs time, then the mount system call will 165 the RAID device at mkfs time, then the mount system call will
166 restore the value from the superblock. For filesystems that 166 restore the value from the superblock. For filesystems that
167 are made directly on RAID devices, these options can be used 167 are made directly on RAID devices, these options can be used
168 to override the information in the superblock if the underlying 168 to override the information in the superblock if the underlying
169 disk layout changes after the filesystem has been created. 169 disk layout changes after the filesystem has been created.
170 The "swidth" option is required if the "sunit" option has been 170 The "swidth" option is required if the "sunit" option has been
171 specified, and must be a multiple of the "sunit" value. 171 specified, and must be a multiple of the "sunit" value.
172 172
173 swalloc 173 swalloc
174 Data allocations will be rounded up to stripe width boundaries 174 Data allocations will be rounded up to stripe width boundaries
175 when the current end of file is being extended and the file 175 when the current end of file is being extended and the file
176 size is larger than the stripe width size. 176 size is larger than the stripe width size.
177 177
178 178
179 sysctls 179 sysctls
180 ======= 180 =======
181 181
182 The following sysctls are available for the XFS filesystem: 182 The following sysctls are available for the XFS filesystem:
183 183
184 fs.xfs.stats_clear (Min: 0 Default: 0 Max: 1) 184 fs.xfs.stats_clear (Min: 0 Default: 0 Max: 1)
185 Setting this to "1" clears accumulated XFS statistics 185 Setting this to "1" clears accumulated XFS statistics
186 in /proc/fs/xfs/stat. It then immediately resets to "0". 186 in /proc/fs/xfs/stat. It then immediately resets to "0".
187 187
188 fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) 188 fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000)
189 The interval at which the xfssyncd thread flushes metadata 189 The interval at which the xfssyncd thread flushes metadata
190 out to disk. This thread will flush log activity out, and 190 out to disk. This thread will flush log activity out, and
191 do some processing on unlinked inodes. 191 do some processing on unlinked inodes.
192 192
193 fs.xfs.xfsbufd_centisecs (Min: 50 Default: 100 Max: 3000) 193 fs.xfs.xfsbufd_centisecs (Min: 50 Default: 100 Max: 3000)
194 The interval at which xfsbufd scans the dirty metadata buffers list. 194 The interval at which xfsbufd scans the dirty metadata buffers list.
195 195
196 fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) 196 fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000)
197 The age at which xfsbufd flushes dirty metadata buffers to disk. 197 The age at which xfsbufd flushes dirty metadata buffers to disk.
198 198
199 fs.xfs.error_level (Min: 0 Default: 3 Max: 11) 199 fs.xfs.error_level (Min: 0 Default: 3 Max: 11)
200 A volume knob for error reporting when internal errors occur. 200 A volume knob for error reporting when internal errors occur.
201 This will generate detailed messages & backtraces for filesystem 201 This will generate detailed messages & backtraces for filesystem
202 shutdowns, for example. Current threshold values are: 202 shutdowns, for example. Current threshold values are:
203 203
204 XFS_ERRLEVEL_OFF: 0 204 XFS_ERRLEVEL_OFF: 0
205 XFS_ERRLEVEL_LOW: 1 205 XFS_ERRLEVEL_LOW: 1
206 XFS_ERRLEVEL_HIGH: 5 206 XFS_ERRLEVEL_HIGH: 5
207 207
208 fs.xfs.panic_mask (Min: 0 Default: 0 Max: 127) 208 fs.xfs.panic_mask (Min: 0 Default: 0 Max: 127)
209 Causes certain error conditions to call BUG(). Value is a bitmask; 209 Causes certain error conditions to call BUG(). Value is a bitmask;
210 AND together the tags which represent errors which should cause panics: 210 AND together the tags which represent errors which should cause panics:
211 211
212 XFS_NO_PTAG 0 212 XFS_NO_PTAG 0
213 XFS_PTAG_IFLUSH 0x00000001 213 XFS_PTAG_IFLUSH 0x00000001
214 XFS_PTAG_LOGRES 0x00000002 214 XFS_PTAG_LOGRES 0x00000002
215 XFS_PTAG_AILDELETE 0x00000004 215 XFS_PTAG_AILDELETE 0x00000004
216 XFS_PTAG_ERROR_REPORT 0x00000008 216 XFS_PTAG_ERROR_REPORT 0x00000008
217 XFS_PTAG_SHUTDOWN_CORRUPT 0x00000010 217 XFS_PTAG_SHUTDOWN_CORRUPT 0x00000010
218 XFS_PTAG_SHUTDOWN_IOERROR 0x00000020 218 XFS_PTAG_SHUTDOWN_IOERROR 0x00000020
219 XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040 219 XFS_PTAG_SHUTDOWN_LOGERROR 0x00000040
220 220
221 This option is intended for debugging only. 221 This option is intended for debugging only.
222 222
223 fs.xfs.irix_symlink_mode (Min: 0 Default: 0 Max: 1) 223 fs.xfs.irix_symlink_mode (Min: 0 Default: 0 Max: 1)
224 Controls whether symlinks are created with mode 0777 (default) 224 Controls whether symlinks are created with mode 0777 (default)
225 or whether their mode is affected by the umask (irix mode). 225 or whether their mode is affected by the umask (irix mode).
226 226
227 fs.xfs.irix_sgid_inherit (Min: 0 Default: 0 Max: 1) 227 fs.xfs.irix_sgid_inherit (Min: 0 Default: 0 Max: 1)
228 Controls files created in SGID directories. 228 Controls files created in SGID directories.
229 If the group ID of the new file does not match the effective group 229 If the group ID of the new file does not match the effective group
230 ID or one of the supplementary group IDs of the parent dir, the 230 ID or one of the supplementary group IDs of the parent dir, the
231 ISGID bit is cleared if the irix_sgid_inherit compatibility sysctl 231 ISGID bit is cleared if the irix_sgid_inherit compatibility sysctl
232 is set. 232 is set.
233 233
234 fs.xfs.inherit_sync (Min: 0 Default: 1 Max: 1) 234 fs.xfs.inherit_sync (Min: 0 Default: 1 Max: 1)
235 Setting this to "1" will cause the "sync" flag set 235 Setting this to "1" will cause the "sync" flag set
236 by the xfs_io(8) chattr command on a directory to be 236 by the xfs_io(8) chattr command on a directory to be
237 inherited by files in that directory. 237 inherited by files in that directory.
238 238
239 fs.xfs.inherit_nodump (Min: 0 Default: 1 Max: 1) 239 fs.xfs.inherit_nodump (Min: 0 Default: 1 Max: 1)
240 Setting this to "1" will cause the "nodump" flag set 240 Setting this to "1" will cause the "nodump" flag set
241 by the xfs_io(8) chattr command on a directory to be 241 by the xfs_io(8) chattr command on a directory to be
242 inherited by files in that directory. 242 inherited by files in that directory.
243 243
244 fs.xfs.inherit_noatime (Min: 0 Default: 1 Max: 1) 244 fs.xfs.inherit_noatime (Min: 0 Default: 1 Max: 1)
245 Setting this to "1" will cause the "noatime" flag set 245 Setting this to "1" will cause the "noatime" flag set
246 by the xfs_io(8) chattr command on a directory to be 246 by the xfs_io(8) chattr command on a directory to be
247 inherited by files in that directory. 247 inherited by files in that directory.
248 248
249 fs.xfs.inherit_nosymlinks (Min: 0 Default: 1 Max: 1) 249 fs.xfs.inherit_nosymlinks (Min: 0 Default: 1 Max: 1)
250 Setting this to "1" will cause the "nosymlinks" flag set 250 Setting this to "1" will cause the "nosymlinks" flag set
251 by the xfs_io(8) chattr command on a directory to be 251 by the xfs_io(8) chattr command on a directory to be
252 inherited by files in that directory. 252 inherited by files in that directory.
253 253
254 fs.xfs.rotorstep (Min: 1 Default: 1 Max: 256) 254 fs.xfs.rotorstep (Min: 1 Default: 1 Max: 256)
255 In "inode32" allocation mode, this option determines how many 255 In "inode32" allocation mode, this option determines how many
256 files the allocator attempts to allocate in the same allocation 256 files the allocator attempts to allocate in the same allocation
257 group before moving to the next allocation group. The intent 257 group before moving to the next allocation group. The intent
258 is to control the rate at which the allocator moves between 258 is to control the rate at which the allocator moves between
259 allocation groups when allocating extents for new files. 259 allocation groups when allocating extents for new files.
260 260