Commit 5c3240d9 authored Jan 13, 2011 by Andrea Arcangeli Committed by Linus Torvalds Jan 13, 2011

thp: don't alloc harder for gfp nomemalloc even if nowait



Not worth throwing away the precious reserved free memory pool for
allocations that can fail gracefully (either through mempool or because
they're transhuge allocations later falling back to 4k allocations).

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 32dba98e

mm/page_alloc.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -1971,6 +1971,11 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
		alloc_flags \|= (__force int) (gfp_mask & __GFP_HIGH);

		if (!wait) {
		/*
		* Not worth trying to allocate harder for
		* __GFP_NOMEMALLOC even if it can't schedule.
		*/
		if (!(gfp_mask & __GFP_NOMEMALLOC))
		alloc_flags \|= ALLOC_HARDER;
		/*
		* Ignore cpuset if GFP_ATOMIC (!wait) rather than fail alloc.