From: Wei Yang Date: Wed, 19 Jun 2024 01:06:12 +0000 (+0000) Subject: mm/page_alloc: reword the comment of buddy_merge_likely() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=08af2c12e3ef379de94ba5653f2f9ae9a588ecd9;p=users%2Fdwmw2%2Flinux.git mm/page_alloc: reword the comment of buddy_merge_likely() 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@gmail.com Signed-off-by: Wei Yang Cc: Mike Rapoport (IBM) Signed-off-by: Andrew Morton --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 299d09accf1f8..8a0fd41376846 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -712,12 +712,12 @@ static inline struct page *get_page_from_free_area(struct free_area *area, } /* - * 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,