From d137a7cb9b2ab8155184b2da9a304afff8f84d36 Mon Sep 17 00:00:00 2001 From: Chen Wandun Date: Fri, 29 Apr 2022 14:36:59 -0700 Subject: [PATCH] mm/page_alloc: simplify update of pgdat in wake_all_kswapds There is no need to update last_pgdat for each zone, only update last_pgdat when iterating the first zone of a node. Link: https://lkml.kernel.org/r/20220322115635.2708989-1-chenwandun@huawei.com Signed-off-by: Chen Wandun Reviewed-by: Andrew Morton Cc: Mel Gorman Cc: Vlastimil Babka Cc: Johannes Weiner Signed-off-by: Andrew Morton --- mm/page_alloc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e80858f5c2ab..f01c71e41bcf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4631,9 +4631,10 @@ static void wake_all_kswapds(unsigned int order, gfp_t gfp_mask, ac->nodemask) { if (!managed_zone(zone)) continue; - if (last_pgdat != zone->zone_pgdat) + if (last_pgdat != zone->zone_pgdat) { wakeup_kswapd(zone, gfp_mask, order, highest_zoneidx); - last_pgdat = zone->zone_pgdat; + last_pgdat = zone->zone_pgdat; + } } } -- 2.20.1