[merged mm-stable] mm-page_alloc-only-search-higher-order-when-fallback.patch removed from -mm tree

[merged mm-stable] mm-page_alloc-only-search-higher-order-when-fallback.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/page_alloc: only search higher order when fallback
has been removed from the -mm tree.  Its filename was
     mm-page_alloc-only-search-higher-order-when-fallback.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: Abel Wu <wuyun.abel@bytedance.com>
Subject: mm/page_alloc: only search higher order when fallback
Date: Wed, 3 Aug 2022 10:51:21 +0800

It seems unnecessary to search pages with order < alloc_order in
fallback allocation.

This can currently happen with ALLOC_NOFRAGMENT and alloc_order >
pageblock_order, so add a test to prevent it.

[vbabka@suse.cz: changelog addition]
Link: https://lkml.kernel.org/r/20220803025121.47018-1-wuyun.abel@bytedance.com
Signed-off-by: Abel Wu <wuyun.abel@bytedance.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/page_alloc.c~mm-page_alloc-only-search-higher-order-when-fallback
+++ a/mm/page_alloc.c
@@ -3010,7 +3010,7 @@ __rmqueue_fallback(struct zone *zone, in
 	 * i.e. orders < pageblock_order. If there are no local zones free,
 	 * the zonelists will be reiterated without ALLOC_NOFRAGMENT.
 	 */
-	if (alloc_flags & ALLOC_NOFRAGMENT)
+	if (order < pageblock_order && alloc_flags & ALLOC_NOFRAGMENT)
 		min_order = pageblock_order;
 
 	/*
_

Patches currently in -mm which might be from wuyun.abel@bytedance.com are