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slob: reduce external fragmentation by using three free lists
authorMatt Mackall <mpm@selenic.com>
Tue, 5 Feb 2008 06:29:37 +0000 (22:29 -0800)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 5 Feb 2008 17:44:19 +0000 (09:44 -0800)
commitf6105623eb2d85e548009828f866b13fa343a036
treefae7206c9aff698b76c5c6aab796539d047947bctree | snapshot
parente369a806fd1872bba133c2d62e8b71eec8ccc0d5commit | diff
slob: reduce external fragmentation by using three free lists

By putting smaller objects on their own list, we greatly reduce overall
external fragmentation and increase repeatability.  This reduces total SLOB
overhead from > 50% to ~6% on a simple boot test.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/slob.c diff | blob | history
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