76 строки
2.1 KiB
C
76 строки
2.1 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 SKIP_HWPOISON 0x1
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#define REPORT_FAILURE 0x2
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bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
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int migratetype, int flags);
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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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* If specified range includes migrate types other than MOVABLE or CMA,
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* this will fail with -EBUSY.
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*
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* For isolating all pages in the range finally, the caller have to
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* free all pages in the range. test_page_isolated() can be used for
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* test it.
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*
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* The following flags are allowed (they can be combined in a bit mask)
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* SKIP_HWPOISON - ignore hwpoison pages
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* REPORT_FAILURE - report details about the failure to isolate the range
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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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unsigned migratetype, int 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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int
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undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
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unsigned 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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bool skip_hwpoisoned_pages);
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struct page *alloc_migrate_target(struct page *page, unsigned long private);
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#endif
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