From 0f87d9d30f21390dd71114f30e63038980e6eb3f Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Thu, 29 Apr 2021 23:01:48 -0700 Subject: mm/page_alloc: add an array-based interface to the bulk page allocator The proposed callers for the bulk allocator store pages from the bulk allocator in an array. This patch adds an array-based interface to the API to avoid multiple list iterations. The page list interface is preserved to avoid requiring all users of the bulk API to allocate and manage enough storage to store the pages. [akpm@linux-foundation.org: remove now unused local `allocated'] Link: https://lkml.kernel.org/r/20210325114228.27719-4-mgorman@techsingularity.net Signed-off-by: Mel Gorman Reviewed-by: Alexander Lobakin Acked-by: Vlastimil Babka Cc: Alexander Duyck Cc: Christoph Hellwig Cc: Chuck Lever Cc: David Miller Cc: Ilias Apalodimas Cc: Jesper Dangaard Brouer Cc: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/gfp.h | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a2be8f4174a9..26f4d907254a 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -520,13 +520,20 @@ struct page *__alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid, unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid, nodemask_t *nodemask, int nr_pages, - struct list_head *list); + struct list_head *page_list, + struct page **page_array); /* Bulk allocate order-0 pages */ static inline unsigned long -alloc_pages_bulk(gfp_t gfp, unsigned long nr_pages, struct list_head *list) +alloc_pages_bulk_list(gfp_t gfp, unsigned long nr_pages, struct list_head *list) { - return __alloc_pages_bulk(gfp, numa_mem_id(), NULL, nr_pages, list); + return __alloc_pages_bulk(gfp, numa_mem_id(), NULL, nr_pages, list, NULL); +} + +static inline unsigned long +alloc_pages_bulk_array(gfp_t gfp, unsigned long nr_pages, struct page **page_array) +{ + return __alloc_pages_bulk(gfp, numa_mem_id(), NULL, nr_pages, NULL, page_array); } /* -- cgit v1.2.3