summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorChristoph Lameter <cl@linux.com>2011-04-14 15:21:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-04-14 16:06:54 -0700
commitd3bc2367180f7ee6afe4ee6e886bfba3ad4eb290 (patch)
tree5adabc909d7ba380d845b9918de83e437e741854
parent9f6ae448bfc6cdf40279f43bb0b4fd159edc4e0a (diff)
downloadop-kernel-dev-d3bc2367180f7ee6afe4ee6e886bfba3ad4eb290.zip
op-kernel-dev-d3bc2367180f7ee6afe4ee6e886bfba3ad4eb290.tar.gz
vmstat: update comment regarding stat_threshold
Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/vmstat.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 772b39b..8cb0f0a 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -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);
OpenPOWER on IntegriCloud