tree 326c45b5592650dc28f0ece22e8d9b5cd810a09d
parent c2aeacd48ca2418fbac985a58d2200c263444d65
author Andrew Morton <akpm@osdl.org> 1137634946 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1137640817 -0800

[PATCH] mm: dirty_exceeded speedup

Ravikiran reports that this variable is bouncing all around nodes on NUMA
machines, causing measurable performance problems.  Fix that up by only
writing to it when it actually changed.

And put it in a new cacheline to prevent it sharing with other things (this
happened).

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>