From: Miaohe Lin Date: Fri, 5 Nov 2021 20:40:08 +0000 (-0700) Subject: mm/page_alloc.c: fix obsolete comment in free_pcppages_bulk() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7cba630bd830472f88ada5fdd34bbfd5825d9217;p=linux.git mm/page_alloc.c: fix obsolete comment in free_pcppages_bulk() The second two paragraphs about "all pages pinned" and pages_scanned is obsolete. And There are PAGE_ALLOC_COSTLY_ORDER + 1 + NR_PCP_THP orders in pcp. So the same order assumption is not held now. Link: https://lkml.kernel.org/r/20210902121242.41607-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Acked-by: Mel Gorman Cc: David Hildenbrand Cc: Peter Zijlstra Cc: Stephen Rothwell Cc: Vlastimil Babka Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8224c6c302dd2..c494c9c66f4f0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1428,14 +1428,8 @@ static inline void prefetch_buddy(struct page *page) /* * Frees a number of pages from the PCP lists - * Assumes all pages on list are in same zone, and of same order. + * Assumes all pages on list are in same zone. * count is the number of pages to free. - * - * If the zone was previously in an "all pages pinned" state then look to - * see if this freeing clears that state. - * - * And clear the zone's pages_scanned counter, to hold off the "all pages are - * pinned" detection logic. */ static void free_pcppages_bulk(struct zone *zone, int count, struct per_cpu_pages *pcp)