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mm, compaction: finish scanning the current pageblock if requested 

cc->finish_pageblock is set when the current pageblock should be rescanned
but fast_find_migrateblock can select an alternative block.  Disable
fast_find_migrateblock when the current pageblock scan should be
completed.

Link: https://lkml.kernel.org/r/20230125134434.18017-4-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Chuyi Zhou <zhouchuyi@bytedance.com>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mel Gorman 2023-01-25 13:44:33 +00:00 committed by Andrew Morton
parent 16b3be4034
commit f9d7fc1ae3
1 changed files with 7 additions and 0 deletions
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7
mm/compaction.c
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@ -1761,6 +1761,13 @@ static unsigned long fast_find_migrateblock(struct compact_control *cc)
if (cc->ignore_skip_hint)
return pfn;
/*
* If the pageblock should be finished then do not select a different
* pageblock.
*/
if (cc->finish_pageblock)
return pfn;
/*
* If the migrate_pfn is not at the start of a zone or the start
* of a pageblock then assume this is a continuation of a previous