The patch titled
Subject: mm/compaction: use correct list in move_freelist_{head}/{tail}
has been added to the -mm mm-unstable branch. Its filename is
mm-compaction-use-correct-list-in-move_freelist_head-tail.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-use-correct-list-in-move_freelist_head-tail.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: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Subject: mm/compaction: use correct list in move_freelist_{head}/{tail}
Date: Fri, 1 Sep 2023 23:51:36 +0800
Patch series "Fixes and cleanups to compaction", v3.
This is a series to do fix and clean up to compaction.
Patch 1-2 fix and clean up freepage list operation.
Patch 3-4 fix and clean up isolation of freepages
Patch 7 factor code to check if compaction is needed for allocation order.
More details can be found in respective patches.
This patch (of 6):
The freepage is chained with buddy_list in freelist head. Use buddy_list
instead of lru to correct the list operation.
Link: https://lkml.kernel.org/r/20230901155141.249860-1-shikemeng@xxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20230901155141.249860-2-shikemeng@xxxxxxxxxxxxxxx
Signed-off-by: Kemeng Shi <shikemeng@xxxxxxxxxxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/compaction.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/mm/compaction.c~mm-compaction-use-correct-list-in-move_freelist_head-tail
+++ a/mm/compaction.c
@@ -1395,8 +1395,8 @@ move_freelist_head(struct list_head *fre
{
LIST_HEAD(sublist);
- if (!list_is_last(freelist, &freepage->lru)) {
- list_cut_before(&sublist, freelist, &freepage->lru);
+ if (!list_is_last(freelist, &freepage->buddy_list)) {
+ list_cut_before(&sublist, freelist, &freepage->buddy_list);
list_splice_tail(&sublist, freelist);
}
}
@@ -1412,8 +1412,8 @@ move_freelist_tail(struct list_head *fre
{
LIST_HEAD(sublist);
- if (!list_is_first(freelist, &freepage->lru)) {
- list_cut_position(&sublist, freelist, &freepage->lru);
+ if (!list_is_first(freelist, &freepage->buddy_list)) {
+ list_cut_position(&sublist, freelist, &freepage->buddy_list);
list_splice_tail(&sublist, freelist);
}
}
_
Patches currently in -mm which might be from shikemeng@xxxxxxxxxxxxxxx are
mm-compaction-use-correct-list-in-move_freelist_head-tail.patch
mm-compaction-call-list_is_first-last-more-intuitively-in-move_freelist_head-tail.patch
mm-compaction-correctly-return-failure-with-bogus-compound_order-in-strict-mode.patch
mm-compaction-remove-repeat-compact_blockskip_flush-check-in-reset_isolation_suitable.patch
mm-compaction-improve-comment-of-is_via_compact_memory.patch
mm-compaction-factor-out-code-to-test-if-we-should-run-compaction-for-target-order.patch
