From: Ravikiran G Thirumalai <kiran@scalex86.org>
Date: Sun, 5 Feb 2006 07:27:58 +0000 (-0800)
Subject: [PATCH] NUMA slab locking fixes: irq disabling from cahep->spinlock to l3 lock
X-Git-Tag: v2.6.16-rc3~155
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca3b9b91735316f0ec7f01976f85842e0bfe5c6e;p=pandora-kernel.git

[PATCH] NUMA slab locking fixes: irq disabling from cahep->spinlock to l3 lock

Earlier, we had to disable on chip interrupts while taking the
cachep->spinlock because, at cache_grow, on every addition of a slab to a slab
cache, we incremented colour_next which was protected by the cachep->spinlock,
and cache_grow could occur at interrupt context.  Since, now we protect the
per-node colour_next with the node's list_lock, we do not need to disable on
chip interrupts while taking the per-cache spinlock, but we just need to
disable interrupts when taking the per-node kmem_list3 list_lock.

Signed-off-by: Alok N Kataria <alokk@calsoftinc.com>
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Cc: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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