Commit d3bc2367 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
Browse files

vmstat: update comment regarding stat_threshold 



Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 9f6ae448

mm/vmstat.c

+6 −3
Original line number Diff line number Diff line
@@ -321,9 +321,12 @@ static inline void mod_state(struct zone *zone, 
		/*

		 * The fetching of the stat_threshold is racy. We may apply

		 * a counter threshold to the wrong the cpu if we get

		 * rescheduled while executing here. However, the following

		 * will apply the threshold again and therefore bring the

		 * counter under the threshold.

		 * rescheduled while executing here. However, the next

		 * counter update will apply the threshold again and

		 * therefore bring the counter under the threshold again.

		 *

		 * Most of the time the thresholds are the same anyways

		 * for all cpus in a zone.

		 */

		t = this_cpu_read(pcp->stat_threshold);