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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 <chenwandun@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Chen Wandun 2022-04-29 14:36:59 -07:00 committed by akpm
parent ec2a0f9c8b
commit d137a7cb9b
1 changed files with 3 additions and 2 deletions
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5
mm/page_alloc.c
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@ -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;
}
}
}