The patch titled
zlc_setup(): handle jiffies wraparound
has been added to the -mm tree. Its filename is
zlc_setup-handle-jiffies-wraparound.patch
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------------------------------------------------------
Subject: zlc_setup(): handle jiffies wraparound
From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
jiffies subtraction may cause an overflow problem. It should be using
time_after().
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Lee Schermerhorn <Lee.Schermerhorn@xxxxxx>
Cc: Paul Jackson <pj@xxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page_alloc.c~zlc_setup-handle-jiffies-wraparound mm/page_alloc.c
--- a/mm/page_alloc.c~zlc_setup-handle-jiffies-wraparound
+++ a/mm/page_alloc.c
@@ -1276,7 +1276,7 @@ static nodemask_t *zlc_setup(struct zone
if (!zlc)
return NULL;
- if (jiffies - zlc->last_full_zap > 1 * HZ) {
+ if (time_after(jiffies, zlc->last_full_zap + HZ)) {
bitmap_zero(zlc->fullzones, MAX_ZONES_PER_ZONELIST);
zlc->last_full_zap = jiffies;
}
_
Patches currently in -mm which might be from kosaki.motohiro@xxxxxxxxxxxxxx are
zlc_setup-handle-jiffies-wraparound.patch
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