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Several functions test MIGRATE_ISOLATE and some of those are hotpath but MIGRATE_ISOLATE is used only if we enable CONFIG_MEMORY_ISOLATION(ie, CMA, memory-hotplug and memory-failure) which are not common config option. So let's not add unnecessary overhead and code when we don't enable CONFIG_MEMORY_ISOLATION. Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
#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 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 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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bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
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bool skip_hwpoisoned_pages);
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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);
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int move_freepages(struct zone *zone,
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struct page *start_page, struct page *end_page,
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int migratetype);
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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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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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/*
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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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/*
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* Internal functions. Changes pageblock's migrate type.
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*/
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int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
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void unset_migratetype_isolate(struct page *page, unsigned migratetype);
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struct page *alloc_migrate_target(struct page *page, unsigned long private,
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int **resultp);
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#endif
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