mm/vmscan: remove redundant current_may_throttle() check

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. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andrey Ryabinin <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Shakeel Butt <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Tejun Heo <[email protected]> Cc: Johannes Weiner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
sfionov · Apr 11, 2018 · c4fd4fa · c4fd4fa
1 parent 894befe
commit c4fd4fa
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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);
 	}