[XFS] Make xfs_ail_check check less by default

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Checking the entire AIL on every insert and remove is prohibitively
expensive - the sustained sequntial create rate on a single disk drops
from about 1800/s to 60/s because of this checking resulting in the
xfslogd becoming cpu bound.

By default on debug builds, only check the next and previous entries in
the list to ensure they are ordered correctly. If you really want, define
XFS_TRANS_DEBUG to use the old behaviour.

SGI-PV: 972759
SGI-Modid: xfs-linux-melb:xfs-kern:30372a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

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David Chinner 2008-02-05 12:13:38 +11:00 • committed by Lachlan McIlroy

parent 249a8c1124

commit de08dbc197

1 changed files with 28 additions and 9 deletions

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fs/xfs/xfs_trans_ail.c

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