Messages in this thread Patch in this message | | | From | Andrey Ryabinin <> | Subject | [PATCH v2 2/4] mm/vmscan: remove redundant current_may_throttle() check | Date | Fri, 23 Mar 2018 18:20:27 +0300 |
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Only kswapd can have non-zero nr_immediate, and current_may_throttle() is always true for kswapd (PF_LESS_THROTTLE bit is never set) thus it's enough to check stat.nr_immediate only.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Michal Hocko <mhocko@suse.com> --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c index 6d74b12099bd..403f59edd53e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1807,7 +1807,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec, * that pages are cycling through the LRU faster than * they are written so also forcibly stall. */ - if (stat.nr_immediate && current_may_throttle()) + if (stat.nr_immediate) congestion_wait(BLK_RW_ASYNC, HZ/10); } -- 2.16.1
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