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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 | 6e263fff1de48fcd97b680b54cd8d1695fc3c776 (patch) | |
| tree | 393bfa41a800b63161c526772acebd12835d688b /mm/page_alloc.c | |
| parent | b2c9e2fbba32539626522b6aed30d1dde7b7e971 (diff) | |
| download | lwn-6e263fff1de48fcd97b680b54cd8d1695fc3c776.tar.gz lwn-6e263fff1de48fcd97b680b54cd8d1695fc3c776.zip | |
mm: page_isolation: enable arbitrary range page isolation.
Now start_isolate_page_range() is ready to handle arbitrary range
isolation, so move the alignment check/adjustment into the function body.
Do the same for its counterpart undo_isolate_page_range().
alloc_contig_range(), its caller, can pass an arbitrary range instead of a
MAX_ORDER_NR_PAGES aligned one.
Link: https://lkml.kernel.org/r/20220425143118.2850746-5-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>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0c7252ed14a0..3d7de8a96143 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -8956,16 +8956,6 @@ void *__init alloc_large_system_hash(const char *tablename, } #ifdef CONFIG_CONTIG_ALLOC -static unsigned long pfn_max_align_down(unsigned long pfn) -{ - return ALIGN_DOWN(pfn, MAX_ORDER_NR_PAGES); -} - -static unsigned long pfn_max_align_up(unsigned long pfn) -{ - return ALIGN(pfn, MAX_ORDER_NR_PAGES); -} - #if defined(CONFIG_DYNAMIC_DEBUG) || \ (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE)) /* Usage: See admin-guide/dynamic-debug-howto.rst */ @@ -9107,8 +9097,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, * put back to page allocator so that buddy can use them. */ - ret = start_isolate_page_range(pfn_max_align_down(start), - pfn_max_align_up(end), migratetype, 0, gfp_mask); + ret = start_isolate_page_range(start, end, migratetype, 0, gfp_mask); if (ret) goto done; @@ -9189,8 +9178,7 @@ int alloc_contig_range(unsigned long start, unsigned long end, free_contig_range(end, outer_end - end); done: - undo_isolate_page_range(pfn_max_align_down(start), - pfn_max_align_up(end), migratetype); + undo_isolate_page_range(start, end, migratetype); return ret; } EXPORT_SYMBOL(alloc_contig_range); |