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mm: compaction: clean up comment about suitable migration target recheck

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checked_pageblock is already removed and suitable_migration_target is not
rechecked under the zone lock since commit f8224aa5a0 ("mm, compaction:
do not recheck suitable_migration_target under lock").  Correct the
comment accordingly.

Link: https://lkml.kernel.org/r/20220418141253.24298-6-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Charan Teja Kalla <charante@codeaurora.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Pintu Kumar <pintu@codeaurora.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-04-28 23:16:17 -07:00 committed by akpm
parent d56c15845a
commit 85f73e6d75
1 changed files with 1 additions and 7 deletions
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8
mm/compaction.c
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@ -599,13 +599,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
if (!PageBuddy(page))
goto isolate_fail;
/*
* If we already hold the lock, we can skip some rechecking.
* Note that if we hold the lock now, checked_pageblock was
* already set in some previous iteration (or strict is true),
* so it is correct to skip the suitable migration target
* recheck as well.
*/
/* If we already hold the lock, we can skip some rechecking. */
if (!locked) {
locked = compact_lock_irqsave(&cc->zone->lock,
&flags, cc);