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nilfs2: issue discard request after cleaning segments

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This adds a function to send discard requests for given array of
segment numbers, and calls the function when garbage collection
succeeded.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Jiro SEKIBA
2010-01-30 18:06:35 +09:00
committed by Ryusuke Konishi
parent 724e6d3fe8
commit e902ec9906
6 changed files with 60 additions and 1 deletions
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Documentation/filesystems/nilfs2.txt
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@ -74,6 +74,9 @@ 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.
NILFS2 usage
============