nilfs2: apply readahead for recovery on mount

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This inserts readahead in the recovery code.  The readahead request is
issued per segment while searching the latest super root block.

This will shorten mount time after unclean unmount.  A measurement
shows the recovery time was reduced by more than 60 percent:

 e.g. real  0m11.586s -> 0m3.918s  (x 2.96)

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

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This commit is contained in:

Ryusuke Konishi 2009-11-19 22:24:48 +09:00

parent f021759d74

commit 050b4142c9

1 changed files with 19 additions and 7 deletions

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fs/nilfs2/recovery.c

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