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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2014-01-06 05:58:27 +0400 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-29 01:20:17 +0400 |
| commit | e07a2ade4426a2cbafae4018aa7b6944bb627a6e (patch) | |
| tree | 7aebc7d70571ee40fb545dd8e85b492ad3b2da27 /Documentation/filesystems/btrfs.txt | |
| parent | fc0ca9af180b91aad2fbf2fe3b16a12e1e05a760 (diff) | |
| download | linux-e07a2ade4426a2cbafae4018aa7b6944bb627a6e.tar.xz | |
btrfs: Add nodiscard mount option.
Add nodiscard mount option to disable discard with remount option.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'Documentation/filesystems/btrfs.txt')
| -rw-r--r-- | Documentation/filesystems/btrfs.txt | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/filesystems/btrfs.txt b/Documentation/filesystems/btrfs.txt index e87609a4e21c..7254cf501391 100644 --- a/Documentation/filesystems/btrfs.txt +++ b/Documentation/filesystems/btrfs.txt @@ -98,9 +98,12 @@ Options with (*) are default options and will not show in the mount options. can be avoided. Especially useful when trying to mount a multi-device setup as root. May be specified multiple times for multiple devices. + nodiscard(*) discard - Issue frequent commands to let the block device reclaim space freed by - the filesystem. This is useful for SSD devices, thinly provisioned + Disable/enable discard mount option. + Discard issues frequent commands to let the block device reclaim space + freed by the filesystem. + This is useful for SSD devices, thinly provisioned LUNs and virtual machine images, but may have a significant performance impact. (The fstrim command is also available to initiate batch trims from userspace). |