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| author | David Rientjes <rientjes@google.com> | 2013-09-30 13:45:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-30 14:31:01 -0700 |
| commit | f6ea3adb70b20ae36277a1b0eaaf4da9f6479a28 (patch) | |
| tree | 9d21f9dfff81d06902db1bdd18d0bd575c06065c /mm/failslab.c | |
| parent | 72023656961b8c81a168a7a6762d589339d0d7ec (diff) | |
| download | op-kernel-dev-f6ea3adb70b20ae36277a1b0eaaf4da9f6479a28.zip op-kernel-dev-f6ea3adb70b20ae36277a1b0eaaf4da9f6479a28.tar.gz | |
mm/compaction.c: periodically schedule when freeing pages
We've been getting warnings about an excessive amount of time spent
allocating pages for migration during memory compaction without
scheduling. isolate_freepages_block() already periodically checks for
contended locks or the need to schedule, but isolate_freepages() never
does.
When a zone is massively long and no suitable targets can be found, this
iteration can be quite expensive without ever doing cond_resched().
Check periodically for the need to reschedule while the compaction free
scanner iterates.
Signed-off-by: David Rientjes <rientjes@google.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/failslab.c')
0 files changed, 0 insertions, 0 deletions
