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Zi Yan
b2c9e2fbba
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. [[email protected]: fix deadlock/crash] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Zi Yan <[email protected]> Reported-by: kernel test robot <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Eric Ren <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Oscar Salvador <[email protected]> Cc: Vlastimil Babka <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_PAGEISOLATION_H
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#define __LINUX_PAGEISOLATION_H
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#ifdef CONFIG_MEMORY_ISOLATION
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static inline bool has_isolate_pageblock(struct zone *zone)
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{
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return zone->nr_isolate_pageblock;
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}
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static inline bool is_migrate_isolate_page(struct page *page)
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{
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return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
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}
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static inline bool is_migrate_isolate(int migratetype)
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{
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return migratetype == MIGRATE_ISOLATE;
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}
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#else
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static inline bool has_isolate_pageblock(struct zone *zone)
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{
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return false;
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}
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static inline bool is_migrate_isolate_page(struct page *page)
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{
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return false;
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}
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static inline bool is_migrate_isolate(int migratetype)
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{
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return false;
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}
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#endif
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#define MEMORY_OFFLINE 0x1
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#define REPORT_FAILURE 0x2
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void set_pageblock_migratetype(struct page *page, int migratetype);
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int move_freepages_block(struct zone *zone, struct page *page,
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int migratetype, int *num_movable);
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/*
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* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
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*/
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int
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start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
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int migratetype, int flags, gfp_t gfp_flags);
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/*
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* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
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* target range is [start_pfn, end_pfn)
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*/
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void
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undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
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int migratetype);
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/*
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* Test all pages in [start_pfn, end_pfn) are isolated or not.
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*/
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int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
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int isol_flags);
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struct page *alloc_migrate_target(struct page *page, unsigned long private);
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#endif
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