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140 lines
2.6 KiB
140 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_MM_PAGE_IDLE_H |
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#define _LINUX_MM_PAGE_IDLE_H |
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#include <linux/bitops.h> |
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#include <linux/page-flags.h> |
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#include <linux/page_ext.h> |
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#ifdef CONFIG_IDLE_PAGE_TRACKING |
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#ifdef CONFIG_64BIT |
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static inline bool page_is_young(struct page *page) |
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{ |
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return PageYoung(page); |
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} |
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static inline void set_page_young(struct page *page) |
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{ |
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SetPageYoung(page); |
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} |
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static inline bool test_and_clear_page_young(struct page *page) |
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{ |
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return TestClearPageYoung(page); |
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} |
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static inline bool page_is_idle(struct page *page) |
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{ |
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return PageIdle(page); |
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} |
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static inline void set_page_idle(struct page *page) |
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{ |
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SetPageIdle(page); |
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} |
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static inline void clear_page_idle(struct page *page) |
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{ |
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ClearPageIdle(page); |
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} |
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#else /* !CONFIG_64BIT */ |
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/* |
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* If there is not enough space to store Idle and Young bits in page flags, use |
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* page ext flags instead. |
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*/ |
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extern struct page_ext_operations page_idle_ops; |
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static inline bool page_is_young(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return false; |
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return test_bit(PAGE_EXT_YOUNG, &page_ext->flags); |
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} |
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static inline void set_page_young(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return; |
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set_bit(PAGE_EXT_YOUNG, &page_ext->flags); |
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} |
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static inline bool test_and_clear_page_young(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return false; |
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return test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags); |
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} |
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static inline bool page_is_idle(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return false; |
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return test_bit(PAGE_EXT_IDLE, &page_ext->flags); |
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} |
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static inline void set_page_idle(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return; |
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set_bit(PAGE_EXT_IDLE, &page_ext->flags); |
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} |
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static inline void clear_page_idle(struct page *page) |
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{ |
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struct page_ext *page_ext = lookup_page_ext(page); |
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if (unlikely(!page_ext)) |
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return; |
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clear_bit(PAGE_EXT_IDLE, &page_ext->flags); |
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} |
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#endif /* CONFIG_64BIT */ |
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#else /* !CONFIG_IDLE_PAGE_TRACKING */ |
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static inline bool page_is_young(struct page *page) |
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{ |
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return false; |
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} |
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static inline void set_page_young(struct page *page) |
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{ |
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} |
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static inline bool test_and_clear_page_young(struct page *page) |
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{ |
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return false; |
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} |
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static inline bool page_is_idle(struct page *page) |
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{ |
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return false; |
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} |
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static inline void set_page_idle(struct page *page) |
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{ |
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} |
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static inline void clear_page_idle(struct page *page) |
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{ |
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} |
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#endif /* CONFIG_IDLE_PAGE_TRACKING */ |
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#endif /* _LINUX_MM_PAGE_IDLE_H */
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