diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-03 08:48:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-03 08:48:21 -0700 |
| commit | eb0ad9c06d51edb5d18a7007fd4d77a8805b2ba7 (patch) | |
| tree | 987595aa0cfa6e9fdf367a1ec3f5e8b04849c777 /Documentation | |
| parent | 1f7df953d687860690cc0e388d0efec215c09e9c (diff) | |
| parent | 84f4141ee3ea11035f741d4298cb6bbad1850fcf (diff) | |
Merge tag 'jfs-3.7' of git://github.com/kleikamp/linux-shaggy
Pull JFS update from Dave Kleikamp:
"JFS TRIM support and some minor fixes"
* tag 'jfs-3.7' of git://github.com/kleikamp/linux-shaggy:
jfs: Fix do_div precision in commit b40c2e66
JFS: use list_move instead of list_del/list_add
jfs: Remove obsolete email address
fs/jfs: TRIM support for JFS Filesystem
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/jfs.txt | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/Documentation/filesystems/jfs.txt b/Documentation/filesystems/jfs.txt index 26ebde77e82..f7433355394 100644 --- a/Documentation/filesystems/jfs.txt +++ b/Documentation/filesystems/jfs.txt @@ -3,6 +3,7 @@ IBM's Journaled File System (JFS) for Linux JFS Homepage: http://jfs.sourceforge.net/ The following mount options are supported: +(*) == default iocharset=name Character set to use for converting from Unicode to ASCII. The default is to do no conversion. Use @@ -21,12 +22,12 @@ nointegrity Do not write to the journal. The primary use of this option from backup media. The integrity of the volume is not guaranteed if the system abnormally abends. -integrity Default. Commit metadata changes to the journal. Use this - option to remount a volume where the nointegrity option was +integrity(*) Commit metadata changes to the journal. Use this option to + remount a volume where the nointegrity option was previously specified in order to restore normal behavior. errors=continue Keep going on a filesystem error. -errors=remount-ro Default. Remount the filesystem read-only on an error. +errors=remount-ro(*) Remount the filesystem read-only on an error. errors=panic Panic and halt the machine if an error occurs. uid=value Override on-disk uid with specified value @@ -35,7 +36,17 @@ umask=value Override on-disk umask with specified octal value. For directories, the execute bit will be set if the corresponding read bit is set. -Please send bugs, comments, cards and letters to shaggy@linux.vnet.ibm.com. +discard=minlen This enables/disables the use of discard/TRIM commands. +discard The discard/TRIM commands are sent to the underlying +nodiscard(*) block device when blocks are freed. This is useful for SSD + devices and sparse/thinly-provisioned LUNs. The FITRIM ioctl + command is also available together with the nodiscard option. + The value of minlen specifies the minimum blockcount, when + a TRIM command to the block device is considered usefull. + When no value is given to the discard option, it defaults to + 64 blocks, which means 256KiB in JFS. + The minlen value of discard overrides the minlen value given + on an FITRIM ioctl(). The JFS mailing list can be subscribed to by using the link labeled "Mail list Subscribe" at our web page http://jfs.sourceforge.net/ |