commit e2cb96b7ecba46888cf00252ffdb8ef1e92c4258
author Christoph Lameter <cl@linux-foundation.org> Tue Aug 19 08:51:22 2008 -0500
committer Pekka Enberg <penberg@cs.helsinki.fi> Wed Aug 20 21:50:21 2008 +0300
tree 98bb362ab0fc0eab37b206a3b8330354406bb357
parent 30a2f3c60a84092c8084dfe788b710f8d0768cd4

slub: Disable NUMA remote node defragmentation by default

Switch remote node defragmentation off by default. The current settings can
cause excessive node local allocations with hackbench:

  SLAB:

    % cat /proc/meminfo
    MemTotal:        7701760 kB
    MemFree:         5940096 kB
    Slab:             123840 kB

  SLUB:

    % cat /proc/meminfo
    MemTotal:        7701376 kB
    MemFree:         4740928 kB
    Slab:            1591680 kB

[Note: this feature is not related to slab defragmentation.]

You can find the original discussion here:

  http://lkml.org/lkml/2008/8/4/308

Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Tested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>