From: David Rientjes <rientjes@google.com>
Date: Mon, 9 Jan 2012 21:19:45 +0000 (-0800)
Subject: slub: disallow changing cpu_partial from userspace for debug caches
X-Git-Tag: v3.3-rc1~99^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=74ee4ef1f901fbb014bdcdc9171d126490ce2b62;p=pandora-kernel.git

slub: disallow changing cpu_partial from userspace for debug caches

For caches with debugging enabled, "slub: Switch per cpu partial page
support off for debugging" changes cpu_partial to 0.  It shouldn't be
tunable from userspace for such caches, otherwise the same accounting
issues arise during validation.

This patch disallows tuning /sys/kernel/slab/cache/cpu_partial to be non-
zero for caches with debugging enabled.

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

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