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| author | Dimitri John Ledkov <xnox@ubuntu.com> | 2017-02-13 11:24:33 +0000 |
|---|---|---|
| committer | Dimitri John Ledkov <xnox@ubuntu.com> | 2017-02-13 11:24:33 +0000 |
| commit | 4305d024938113df5d73021a09eb2a991f54ca2f (patch) | |
| tree | d9e7ecc9db14bcc1394607a9e6c644a8b93e9bea /Documentation/btrfs-check.asciidoc | |
| parent | e693f0e4ffb1776a05b78264ee3d93d5f07efede (diff) | |
New upstream release Closes: #849353, #817806, #854915, #845473
Diffstat (limited to 'Documentation/btrfs-check.asciidoc')
| -rw-r--r-- | Documentation/btrfs-check.asciidoc | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/btrfs-check.asciidoc b/Documentation/btrfs-check.asciidoc index abc9f0dc..633cbbf6 100644 --- a/Documentation/btrfs-check.asciidoc +++ b/Documentation/btrfs-check.asciidoc @@ -20,7 +20,7 @@ by the option '--readonly'. *btrfsck* is an alias of *btrfs check* command and is now deprecated. -WARNING: Do not use '--repair' unless you are adviced to by a developer, an +WARNING: Do not use '--repair' unless you are advised to by a developer, an experienced user or accept the fact that 'fsck' cannot possibly fix all sorts of damage that could happen to a filesystem because of software and hardware bugs. @@ -78,6 +78,20 @@ respective superblock offset is within the device size This can be used to use a different starting point if some of the primary superblock is damaged. +--clear-space-cache v1|v2:: +completely wipe all free space cache of given type ++ +For free space cache 'v1', the 'clear_cache' kernel mount option only rebuilds +the free space cache for block groups that are modified while the filesystem is +mounted with that option. Thus, using this option with 'v1' makes it possible +to actually clear the entire free space cache. ++ +For free space cache 'v2', the 'clear_cache' kernel mount option does destroy +the entire free space cache. This option with 'v2' provides an alternative +method of clearing the free space cache that doesn't require mounting the +filesystem. + + DANGEROUS OPTIONS ----------------- |