Commit 9efa4479 authored May 07, 2018 by Vinayak Menon

mm: vmpressure: fix dual calls to global vmpressure



vmpressure function is invoked multiple time from shrink_node,
once for each memcg and then for the entire subtree. But global
vmpressure calculation is performed for each of these calls
resulting in window period ending fast. This is not a problem
when CONFIG_MEMCG is enabled, as global vmpressure is not used
in that case. With !CONFIG_MEMCG global vmpressure is called
twice. Fix this.

Change-Id: I9262790dbe38880e56917b2214c2da59a342ce66
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>

parent cd4a99b6

mm/vmpressure.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -423,7 +423,7 @@ static void vmpressure_global(gfp_t gfp, unsigned long scanned,
		void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
		unsigned long scanned, unsigned long reclaimed)
		{
		if (!memcg)
		if (!memcg && tree)
		vmpressure_global(gfp, scanned, reclaimed);

		if (IS_ENABLED(CONFIG_MEMCG))