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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-07-05 14:27:04 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-07-23 10:02:12 +0900 |
| commit | 802d31775404ee335ca1e97a82e1e706a4c843be (patch) | |
| tree | 3753263ea97748e6c2b01f29fb7f81c19381eb7b /Documentation/filesystems | |
| parent | 773bc4f3b6898634a80a41c72a1f34cb89992dcd (diff) | |
| download | blackbird-obmc-linux-802d31775404ee335ca1e97a82e1e706a4c843be.tar.gz blackbird-obmc-linux-802d31775404ee335ca1e97a82e1e706a4c843be.zip | |
nilfs2: add nodiscard mount option
Nilfs has "discard" mount option which issues discard/TRIM commands to
underlying block device, but it lacks a complementary option and has
no way to disable the feature through remount.
This adds "nodiscard" option to resolve this imbalance.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/nilfs2.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt index 54f61c0ff442..d5c0cef38a71 100644 --- a/Documentation/filesystems/nilfs2.txt +++ b/Documentation/filesystems/nilfs2.txt @@ -77,9 +77,10 @@ norecovery Disable recovery of the filesystem on mount. This disables every write access on the device for read-only mounts or snapshots. This option will fail for r/w mounts on an unclean volume. -discard Issue discard/TRIM commands to the underlying block - device when blocks are freed. This is useful for SSD - devices and sparse/thinly-provisioned LUNs. +discard This enables/disables the use of discard/TRIM commands. +nodiscard(*) The discard/TRIM commands are sent to the underlying + block device when blocks are freed. This is useful + for SSD devices and sparse/thinly-provisioned LUNs. NILFS2 usage ============ |
