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authorChristoph Lameter <clameter@engr.sgi.com>2006-02-01 03:05:35 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:16 -0800
commit2a16e3f4b0c408b9e50297d2ec27e295d490267a (patch)
tree71569cfdf06fb83497e88e4e6543fbe624488aa3 /mm/shmem.c
parent1b2ffb7896ad46067f5b9ebf7de1891d74a4cdef (diff)
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[PATCH] Reclaim slab during zone reclaim
If large amounts of zone memory are used by empty slabs then zone_reclaim becomes uneffective. This patch shakes the slab a bit. The problem with this patch is that the slab reclaim is not containable to a zone. Thus slab reclaim may affect the whole system and be extremely slow. This also means that we cannot determine how many pages were freed in this zone. Thus we need to go off node for at least one allocation. The functionality is disabled by default. We could modify the shrinkers to take a zone parameter but that would be quite invasive. Better ideas are welcome. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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