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authorPaul Jackson <pj@sgi.com>2006-01-08 01:01:54 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:13:43 -0800
commitcf2a473c4089aa41c26f653200673f5a4cc25047 (patch)
tree0bce21f4684a382b13e93ba5b85409cf5eab1c2c /fs/cramfs
parentb4b2641843db124637fa3d2cb2101982035dcc82 (diff)
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op-kernel-dev-cf2a473c4089aa41c26f653200673f5a4cc25047.tar.gz
[PATCH] cpuset: combine refresh_mems and update_mems
The important code paths through alloc_pages_current() and alloc_page_vma(), by which most kernel page allocations go, both called cpuset_update_current_mems_allowed(), which in turn called refresh_mems(). -Both- of these latter two routines did a tasklock, got the tasks cpuset pointer, and checked for out of date cpuset->mems_generation. That was a silly duplication of code and waste of CPU cycles on an important code path. Consolidated those two routines into a single routine, called cpuset_update_task_memory_state(), since it updates more than just mems_allowed. Changed all callers of either routine to call the new consolidated routine. Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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