[PATCH] Fix reiserfs latencies caused by data=ordered

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ReiserFS does periodic cleanup of old transactions in order to limit the
length of time a journal replay may take after a crash.  Sometimes, writing
metadata from an old (already committed) transaction may require committing
a newer transaction, which also requires writing all data=ordered buffers.
This can cause very long stalls on journal_begin.

This patch makes sure new transactions will not need to be committed before
trying a periodic reclaim of an old transaction.  It is low risk because if
a bad decision is made, it just means a slightly longer journal replay
after a crash.

Signed-off-by: Chris Mason <mason@suse.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

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Chris Mason 2006-09-29 01:59:56 -07:00 • committed by Linus Torvalds

parent 25736b1c69

commit a317202714

1 changed files with 43 additions and 11 deletions

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54

fs/reiserfs/journal.c

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