Commit 23f8a2f5 authored Dec 17, 2015 by Vinayak Menon Committed by Patrick Daly Mar 29, 2017

mm: memory: reduce fault_around_bytes



mapping multiple pages on a fault result in page_check_references
hitting more number of referenced inactive pages and this results
in increased pressure on reclaim. Reduce it to the lowest possible
value. Reduced kswapd wakeups are observed with this change.

Change-Id: I03c6cac9f28fa328abab7b40f5f01144084a147c
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Patrick Daly <pdaly@codeaurora.org>

parent 9645c9ed

mm/memory.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3050,7 +3050,7 @@ int alloc_set_pte(struct fault_env fe, struct mem_cgroup memcg,
		}

		static unsigned long fault_around_bytes __read_mostly =
		rounddown_pow_of_two(65536);
		rounddown_pow_of_two(4096);

		#ifdef CONFIG_DEBUG_FS
		static int fault_around_bytes_get(void data, u64 val)