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authorDavid Rientjes <rientjes@google.com>2013-09-30 22:45:03 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-30 23:31:01 +0200
commitf6ea3adb70b20ae36277a1b0eaaf4da9f6479a28 (patch)
tree9d21f9dfff81d06902db1bdd18d0bd575c06065c /ipc/sem.c
parentfs/binfmt_elf.c: prevent a coredump with a large vm_map_count from Oopsing (diff)
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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 'ipc/sem.c')
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