+ mm-compaction-improve-comment-of-is_via_compact_memory.patch added to mm-unstable branch

+ mm-compaction-improve-comment-of-is_via_compact_memory.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/compaction: improve comment of is_via_compact_memory
has been added to the -mm mm-unstable branch.  Its filename is
     mm-compaction-improve-comment-of-is_via_compact_memory.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-compaction-improve-comment-of-is_via_compact_memory.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@huaweicloud.com>
Subject: mm/compaction: improve comment of is_via_compact_memory
Date: Fri, 1 Sep 2023 23:51:40 +0800

We do proactive compaction with order == -1 via
1. /proc/sys/vm/compact_memory
2. /sys/devices/system/node/nodex/compact
3. /proc/sys/vm/compaction_proactiveness
Add missed situation in which order == -1.

Link: https://lkml.kernel.org/r/20230901155141.249860-6-shikemeng@huaweicloud.com
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/compaction.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/mm/compaction.c~mm-compaction-improve-comment-of-is_via_compact_memory
+++ a/mm/compaction.c
@@ -2065,8 +2065,10 @@ static isolate_migrate_t isolate_migrate
 }
 
 /*
- * order == -1 is expected when compacting via
- * /proc/sys/vm/compact_memory
+ * order == -1 is expected when compacting proactively via
+ * 1. /proc/sys/vm/compact_memory
+ * 2. /sys/devices/system/node/nodex/compact
+ * 3. /proc/sys/vm/compaction_proactiveness
  */
 static inline bool is_via_compact_memory(int order)
 {
_

Patches currently in -mm which might be from shikemeng@huaweicloud.com 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