The patch titled
Subject: mm, compaction: finish scanning the current pageblock if requested
has been added to the -mm mm-unstable branch. Its filename is
mm-compaction-finish-scanning-the-current-pageblock-if-requested.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-finish-scanning-the-current-pageblock-if-requested.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
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
mm-page_alloc-rename-alloc_high-to-alloc_min_reserve.patch
mm-page_alloc-treat-rt-tasks-similar-to-__gfp_high.patch
mm-page_alloc-explicitly-record-high-order-atomic-allocations-in-alloc_flags.patch
mm-page_alloc-explicitly-define-what-alloc-flags-deplete-min-reserves.patch
mm-page_alloc-explicitly-define-how-__gfp_high-non-blocking-allocations-accesses-reserves.patch
mm-compaction-rename-compact_control-rescan-to-finish_pageblock.patch
mm-compaction-check-if-a-page-has-been-captured-before-draining-pcp-pages.patch
mm-compaction-finish-scanning-the-current-pageblock-if-requested.patch
mm-compaction-finish-pageblocks-on-complete-migration-failure.patch
