mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Zi Yan](/assets/img/avatar_default.png)
Now alloc_contig_range() works at pageblock granularity. Change CMA allocation, which uses alloc_contig_range(), to use pageblock_nr_pages alignment. Link: https://lkml.kernel.org/r/20220425143118.2850746-6-zi.yan@sent.com Signed-off-by: Zi Yan <ziy@nvidia.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Hildenbrand <david@redhat.com> Cc: Eric Ren <renzhengeek@gmail.com> Cc: kernel test robot <lkp@intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
59 lines
2 KiB
C
59 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __CMA_H__
|
|
#define __CMA_H__
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/numa.h>
|
|
|
|
/*
|
|
* There is always at least global CMA area and a few optional
|
|
* areas configured in kernel .config.
|
|
*/
|
|
#ifdef CONFIG_CMA_AREAS
|
|
#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
|
|
#endif
|
|
|
|
#define CMA_MAX_NAME 64
|
|
|
|
/*
|
|
* the buddy -- especially pageblock merging and alloc_contig_range()
|
|
* -- can deal with only some pageblocks of a higher-order page being
|
|
* MIGRATE_CMA, we can use pageblock_nr_pages.
|
|
*/
|
|
#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages
|
|
#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES)
|
|
|
|
struct cma;
|
|
|
|
extern unsigned long totalcma_pages;
|
|
extern phys_addr_t cma_get_base(const struct cma *cma);
|
|
extern unsigned long cma_get_size(const struct cma *cma);
|
|
extern const char *cma_get_name(const struct cma *cma);
|
|
|
|
extern int __init cma_declare_contiguous_nid(phys_addr_t base,
|
|
phys_addr_t size, phys_addr_t limit,
|
|
phys_addr_t alignment, unsigned int order_per_bit,
|
|
bool fixed, const char *name, struct cma **res_cma,
|
|
int nid);
|
|
static inline int __init cma_declare_contiguous(phys_addr_t base,
|
|
phys_addr_t size, phys_addr_t limit,
|
|
phys_addr_t alignment, unsigned int order_per_bit,
|
|
bool fixed, const char *name, struct cma **res_cma)
|
|
{
|
|
return cma_declare_contiguous_nid(base, size, limit, alignment,
|
|
order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
|
|
}
|
|
extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
|
|
unsigned int order_per_bit,
|
|
const char *name,
|
|
struct cma **res_cma);
|
|
extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align,
|
|
bool no_warn);
|
|
extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned long count);
|
|
extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
|
|
|
|
extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);
|
|
|
|
extern void cma_reserve_pages_on_error(struct cma *cma);
|
|
#endif
|