page-isolation.h 1.88 KB
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_PAGEISOLATION_H
#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)
{
	return zone->nr_isolate_pageblock;
}
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static inline bool is_migrate_isolate_page(struct page *page)
{
	return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
}
static inline bool is_migrate_isolate(int migratetype)
{
	return migratetype == MIGRATE_ISOLATE;
}
#else
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static inline bool has_isolate_pageblock(struct zone *zone)
{
	return false;
}
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static inline bool is_migrate_isolate_page(struct page *page)
{
	return false;
}
static inline bool is_migrate_isolate(int migratetype)
{
	return false;
}
#endif
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bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
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			 int migratetype, bool skip_hwpoisoned_pages);
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void set_pageblock_migratetype(struct page *page, int migratetype);
int move_freepages_block(struct zone *zone, struct page *page,
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				int migratetype, int *num_movable);
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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.
 *
 * For isolating all pages in the range finally, the caller have to
 * free all pages in the range. test_page_isolated() can be used for
 * test it.
 */
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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, bool skip_hwpoisoned_pages);
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/*
 * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
 * target range is [start_pfn, end_pfn)
 */
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int
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undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
			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,
			bool skip_hwpoisoned_pages);
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struct page *alloc_migrate_target(struct page *page, unsigned long private);
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#endif