This small series is an optimization of pcplists draining. In many cases, it is sufficient to drain pcplists of a single zone, and draining all zones is a waste of cycles, and then it results in more pcplists refilling. Patch 1 introduces "struct zone *" parameter to drain_local_pages() and drain_all_pages(), where NULL value means that all zones are drained as usual. Remaining patches convert existing callers to single zone drain where appropriate. One might wonder why compaction is not touched, and the answer is that it will be posted later, as it's a larger change. Vlastimil Babka (4): mm: introduce single zone pcplists drain mm, page_isolation: drain single zone pcplists mm, cma: drain single zone pcplists mm, memory_hotplug/failure: drain single zone pcplists include/linux/gfp.h | 4 +-- mm/memory-failure.c | 4 +-- mm/memory_hotplug.c | 4 +-- mm/page_alloc.c | 81 ++++++++++++++++++++++++++++++++++++----------------- mm/page_isolation.c | 2 +- 5 files changed, 63 insertions(+), 32 deletions(-) -- 1.8.4.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>