The patch titled
Subject: mm/page_alloc: simplify update of pgdat in wake_all_kswapds
has been added to the -mm tree. Its filename is
mm-page_alloc-simplify-update-of-pgdat-in-wake_all_kswapds.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-simplify-update-of-pgdat-in-wake_all_kswapds.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-simplify-update-of-pgdat-in-wake_all_kswapds.patch
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------------------------------------------------------
From: Chen Wandun <chenwandun@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Signed-off-by: Chen Wandun <chenwandun@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/page_alloc.c~mm-page_alloc-simplify-update-of-pgdat-in-wake_all_kswapds
+++ a/mm/page_alloc.c
@@ -4674,9 +4674,10 @@ static void wake_all_kswapds(unsigned in
for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, highest_zoneidx,
ac->nodemask) {
- 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;
+ }
}
}
_
Patches currently in -mm which might be from chenwandun@xxxxxxxxxx are
mm-page_alloc-simplify-update-of-pgdat-in-wake_all_kswapds.patch
