The quilt patch titled
Subject: mm, compaction: finish scanning the current pageblock if requested
has been removed from the -mm tree. Its filename was
mm-compaction-finish-scanning-the-current-pageblock-if-requested.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Subject: mm, compaction: finish scanning the current pageblock if requested
Date: Wed, 25 Jan 2023 13:44:33 +0000
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@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Chuyi Zhou <zhouchuyi@xxxxxxxxxxxxx>
Cc: Jiri Slaby <jirislaby@xxxxxxxxxx>
Cc: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Pedro Falcato <pedro.falcato@xxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/compaction.c~mm-compaction-finish-scanning-the-current-pageblock-if-requested
+++ a/mm/compaction.c
@@ -1762,6 +1762,13 @@ static unsigned long fast_find_migratebl
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
* scan restarted due to COMPACT_CLUSTER_MAX.
_
Patches currently in -mm which might be from mgorman@xxxxxxxxxxxxxxxxxxx are
