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authorRavikiran G Thirumalai <kiran@scalex86.org>2006-02-04 23:27:58 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-05 11:06:53 -0800
commitca3b9b91735316f0ec7f01976f85842e0bfe5c6e (patch)
treefc58744ab0371adb5942462ceab3fa70d0ef9375 /Documentation/cris
parent2e1217cf96b54d3b2d0162930608159e73507fbf (diff)
[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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