From 93481ff0e5a0c7636359a7ee52248856da5e7859 Mon Sep 17 00:00:00 2001 From: Vlastimil Babka Date: Wed, 10 Dec 2014 15:43:01 -0800 Subject: mm: introduce single zone pcplists drain The functions for draining per-cpu pages back to buddy allocators currently always operate on all zones. There are however several cases where the drain is only needed in the context of a single zone, and spilling other pcplists is a waste of time both due to the extra spilling and later refilling. This patch introduces new zone pointer parameter to drain_all_pages() and changes the dummy parameter of drain_local_pages() to be also a zone pointer. When NULL is passed, the functions operate on all zones as usual. Passing a specific zone pointer reduces the work to the single zone. All callers are updated to pass the NULL pointer in this patch. Conversion to single zone (where appropriate) is done in further patches. Signed-off-by: Vlastimil Babka Cc: Naoya Horiguchi Cc: Mel Gorman Cc: Rik van Riel Cc: Yasuaki Ishimatsu Cc: Zhang Yanfei Cc: Xishi Qiu Cc: Vladimir Davydov Cc: Joonsoo Kim Cc: Michal Nazarewicz Cc: Marek Szyprowski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/gfp.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/gfp.h') diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 41b30fd4d041..07d2699cdb51 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -381,8 +381,8 @@ extern void free_kmem_pages(unsigned long addr, unsigned int order); void page_alloc_init(void); void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); -void drain_all_pages(void); -void drain_local_pages(void *dummy); +void drain_all_pages(struct zone *zone); +void drain_local_pages(struct zone *zone); /* * gfp_allowed_mask is set to GFP_BOOT_MASK during early boot to restrict what -- cgit v1.2.3-59-g8ed1b