[PATCH] Zone reclaim: resurrect may_swap
authorChristoph Lameter <clameter@sgi.com>
Thu, 19 Jan 2006 01:42:30 +0000 (17:42 -0800)
committerLinus Torvalds <torvalds@g5.osdl.org>
Thu, 19 Jan 2006 03:20:17 +0000 (19:20 -0800)
commitf1fd1067ece574ab56e4a70878b9a5a1ed4c3c42
treef7f9d092ac0ed8bd734245d803b563b5e751c8ad
parentfc3012896337c83a056c496d7cfb0072e1591181
[PATCH] Zone reclaim: resurrect may_swap

Zone reclaim has a huge impact on NUMA performance (f.e.  our maximum
throughput with XFS is raised from 4GB to 6GB/sec / page cache contamination
of numa nodes destroys locality if one just does a large copy operation which
results in performance dropping for good until reboot).

This patch:

Resurrect may_swap in struct scan_control

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
mm/vmscan.c