The patch titled
Subject: mm/page_alloc: reword the comment of buddy_merge_likely()
has been added to the -mm mm-unstable branch. Its filename is
mm-page_alloc-reword-the-comment-of-buddy_merge_likely.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_alloc-reword-the-comment-of-buddy_merge_likely.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: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/page_alloc: reword the comment of buddy_merge_likely()
Date: Wed, 19 Jun 2024 01:06:12 +0000
For page with order O, we are checking its order (O + 1)'s buddy. If it
is free, we would like to put it to the tail and expect it would be merged
to a page with order (O + 2).
Reword the comment to reflect it.
Link: https://lkml.kernel.org/r/20240619010612.20740-4-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/page_alloc.c~mm-page_alloc-reword-the-comment-of-buddy_merge_likely
+++ a/mm/page_alloc.c
@@ -711,12 +711,12 @@ static inline struct page *get_page_from
}
/*
- * If this is not the largest possible page, check if the buddy
- * of the next-highest order is free. If it is, it's possible
+ * If this is less than the 2nd largest possible page, check if the buddy
+ * of the next-higher order is free. If it is, it's possible
* that pages are being freed that will coalesce soon. In case,
* that is happening, add the free page to the tail of the list
* so it's less likely to be used soon and more likely to be merged
- * as a higher order page
+ * as a 2-level higher order page
*/
static inline bool
buddy_merge_likely(unsigned long pfn, unsigned long buddy_pfn,
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxx are
mm-mm_initc-print-mem_init-info-after-defer_init-is-done.patch
mm-mm_initc-simplify-logic-of-deferred__pages.patch
mm-mm_initc-simplify-logic-of-deferred__pages-v2.patch
mm-sparse-nr_pages-wont-be-0.patch
mm-mm_initc-move-build-check-on-max_zonelists-out-of-ifdef.patch
mm-page_alloc-fix-a-typo-in-comment-about-gfp-flag.patch
mm-page_alloc-reword-the-comment-of-buddy_merge_likely.patch
