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[XFS] On machines with more than 8 cpus, when running parallel I/O

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threads, the incore superblock lock becomes the limiting factor for
buffered write throughput. Make the contended fields in the incore
superblock use per-cpu counters so that there is no global lock to limit
scalability.

SGI-PV: 946630
SGI-Modid: xfs-linux-melb:xfs-kern:25106a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
This commit is contained in:
David Chinner
2006-03-14 13:13:09 +11:00
committed by Nathan Scott
parent 9f4cbecd7e
commit 8d280b98cf
5 changed files with 586 additions and 17 deletions
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fs/xfs/xfs_fsops.c
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@@ -462,6 +462,7 @@ xfs_fs_counts(
{
unsigned long s;
xfs_icsb_sync_counters_lazy(mp);
s = XFS_SB_LOCK(mp);
cnt->freedata = mp->m_sb.sb_fdblocks;
cnt->freertx = mp->m_sb.sb_frextents;