On 1/25/23 14:44, Mel Gorman wrote: > 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. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> > --- > mm/compaction.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/mm/compaction.c b/mm/compaction.c > index 28711a21a8a2..4b3a0238879c 100644 > --- a/mm/compaction.c > +++ b/mm/compaction.c > @@ -1762,6 +1762,13 @@ 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
