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Diffstat (limited to 'Documentation/filesystems/jfs.txt')
| -rw-r--r-- | Documentation/filesystems/jfs.txt | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/Documentation/filesystems/jfs.txt b/Documentation/filesystems/jfs.txt index 3e992daf99a..41fd757997b 100644 --- a/Documentation/filesystems/jfs.txt +++ b/Documentation/filesystems/jfs.txt @@ -3,10 +3,11 @@ 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 - iocharset=utf8 for UTF8 translations. This requires + iocharset=utf8 for UTF-8 translations. This requires CONFIG_NLS_UTF8 to be set in the kernel .config file. iocharset=none specifies the default behavior explicitly. @@ -21,15 +22,31 @@ 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. -Please send bugs, comments, cards and letters to shaggy@austin.ibm.com. +uid=value Override on-disk uid with specified value +gid=value Override on-disk gid with specified value +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. + +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 useful. + 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/ |