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author | David Rientjes <rientjes@google.com> | 2008-11-12 16:25:37 -0500 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-12 20:17:16 -0500 |
commit | e33c3b5e172e2e45456f42fba47227d48745543f (patch) | |
tree | 0dc15f10c63b36b12de1dee6b3b70108286a5058 /mm/migrate.c | |
parent | f0f7e0dc7393268947dc3ed285defc3d375487b9 (diff) |
cpusets: update mems allowed in page allocator
If all allowable memory is unreclaimable, it is possible to loop forever
in the page allocator for ~__GFP_NORETRY allocations.
During this time, it is also possible for a task's cpuset to expand its
set of allowable nodes so that it now includes free memory. The cached
copy of this set, current->mems_allowed, is stale, however, since there
has not been a subsequent call to cpuset_update_task_memory_state().
The cached copy of the set of allowable nodes is now updated in the page
allocator's slow path so the additional memory is available to
get_page_from_freelist().
[akpm@linux-foundation.org: add comment]
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Paul Menage <menage@google.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
0 files changed, 0 insertions, 0 deletions