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| author | Zi Yan <ziy@nvidia.com> | 2022-05-12 20:22:58 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-05-13 07:20:13 -0700 |
| commit | b2c9e2fbba32539626522b6aed30d1dde7b7e971 (patch) | |
| tree | bcfc416b5ef0adf5f41d4d09175a736a1bd3b98a /mm/internal.h | |
| parent | 844fbae63e468e32e3a3970868602a4bb658aff9 (diff) | |
| download | linux-b2c9e2fbba32539626522b6aed30d1dde7b7e971.tar.gz | |
mm: make alloc_contig_range work at pageblock granularity
alloc_contig_range() worked at MAX_ORDER_NR_PAGES granularity to avoid
merging pageblocks with different migratetypes. It might unnecessarily
convert extra pageblocks at the beginning and at the end of the range.
Change alloc_contig_range() to work at pageblock granularity.
Special handling is needed for free pages and in-use pages across the
boundaries of the range specified by alloc_contig_range(). Because these=
Partially isolated pages causes free page accounting issues. The free
pages will be split and freed into separate migratetype lists; the in-use=
Pages will be migrated then the freed pages will be handled in the
aforementioned way.
[ziy@nvidia.com: fix deadlock/crash]
Link: https://lkml.kernel.org/r/23A7297E-6C84-4138-A9FE-3598234004E6@nvidia.com
Link: https://lkml.kernel.org/r/20220425143118.2850746-4-zi.yan@sent.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: David Hildenbrand <david@redhat.com>
Cc: Eric Ren <renzhengeek@gmail.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>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index ddd09245a6db0..a770029beb080 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -359,6 +359,9 @@ extern void *memmap_alloc(phys_addr_t size, phys_addr_t align, phys_addr_t min_addr, int nid, bool exact_nid); +void split_free_page(struct page *free_page, + int order, unsigned long split_pfn_offset); + #if defined CONFIG_COMPACTION || defined CONFIG_CMA /* @@ -422,6 +425,9 @@ isolate_freepages_range(struct compact_control *cc, int isolate_migratepages_range(struct compact_control *cc, unsigned long low_pfn, unsigned long end_pfn); + +int __alloc_contig_migrate_range(struct compact_control *cc, + unsigned long start, unsigned long end); #endif int find_suitable_fallback(struct free_area *area, unsigned int order, int migratetype, bool only_stealable, bool *can_steal); |