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mm/page_alloc: add an array-based interface to the bulk page allocator

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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 <mgorman@techsingularity.net>
Reviewed-by: Alexander Lobakin <alobakin@pm.me>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: David Miller <davem@davemloft.net>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman 2021-04-29 23:01:48 -07:00 • committed by Linus Torvalds
parent 387ba26fb1
commit 0f87d9d30f
2 changed files with 54 additions and 19 deletions
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13
include/linux/gfp.h
View file

@ -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);
}
/*