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Date: Fri, 1 Jun 2012 05:24:04 -0700 From: Anton Vorontsov <anton.vorontsov@...aro.org> To: Pekka Enberg <penberg@...nel.org> Cc: Leonid Moiseichuk <leonid.moiseichuk@...ia.com>, KOSAKI Motohiro <kosaki.motohiro@...il.com>, Minchan Kim <minchan@...nel.org>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org, linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org, patches@...aro.org, kernel-team@...roid.com Subject: [PATCH 3/5] vmevent: Refresh vmstats before sampling On SMP, kernel updates vmstats only once per second, which makes vmevent unusable. Let's fix it by updating vmstats before sampling. Reported-by: KOSAKI Motohiro <kosaki.motohiro@...il.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@...aro.org> --- mm/vmevent.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/vmevent.c b/mm/vmevent.c index 4ca2a04..35fd0d5 100644 --- a/mm/vmevent.c +++ b/mm/vmevent.c @@ -2,6 +2,7 @@ #include <linux/atomic.h> #include <linux/compiler.h> #include <linux/vmevent.h> +#include <linux/mm.h> #include <linux/syscalls.h> #include <linux/workqueue.h> #include <linux/file.h> @@ -163,6 +164,9 @@ static void vmevent_sample(struct vmevent_watch *watch) if (atomic_read(&watch->pending)) return; + + refresh_vm_stats(); + if (!vmevent_match(watch)) return; -- 1.7.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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