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107 lines
2.9 KiB
107 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef LINUX_MM_INLINE_H |
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#define LINUX_MM_INLINE_H |
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#include <linux/huge_mm.h> |
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#include <linux/swap.h> |
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/** |
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* page_is_file_lru - should the page be on a file LRU or anon LRU? |
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* @page: the page to test |
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* |
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* Returns 1 if @page is a regular filesystem backed page cache page or a lazily |
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* freed anonymous page (e.g. via MADV_FREE). Returns 0 if @page is a normal |
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* anonymous page, a tmpfs page or otherwise ram or swap backed page. Used by |
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* functions that manipulate the LRU lists, to sort a page onto the right LRU |
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* list. |
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* |
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* We would like to get this info without a page flag, but the state |
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* needs to survive until the page is last deleted from the LRU, which |
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* could be as far down as __page_cache_release. |
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*/ |
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static inline int page_is_file_lru(struct page *page) |
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{ |
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return !PageSwapBacked(page); |
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} |
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static __always_inline void update_lru_size(struct lruvec *lruvec, |
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enum lru_list lru, enum zone_type zid, |
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int nr_pages) |
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{ |
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struct pglist_data *pgdat = lruvec_pgdat(lruvec); |
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__mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages); |
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__mod_zone_page_state(&pgdat->node_zones[zid], |
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NR_ZONE_LRU_BASE + lru, nr_pages); |
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#ifdef CONFIG_MEMCG |
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mem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages); |
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#endif |
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} |
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/** |
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* __clear_page_lru_flags - clear page lru flags before releasing a page |
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* @page: the page that was on lru and now has a zero reference |
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*/ |
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static __always_inline void __clear_page_lru_flags(struct page *page) |
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{ |
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VM_BUG_ON_PAGE(!PageLRU(page), page); |
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__ClearPageLRU(page); |
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/* this shouldn't happen, so leave the flags to bad_page() */ |
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if (PageActive(page) && PageUnevictable(page)) |
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return; |
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__ClearPageActive(page); |
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__ClearPageUnevictable(page); |
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} |
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/** |
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* page_lru - which LRU list should a page be on? |
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* @page: the page to test |
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* |
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* Returns the LRU list a page should be on, as an index |
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* into the array of LRU lists. |
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*/ |
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static __always_inline enum lru_list page_lru(struct page *page) |
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{ |
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enum lru_list lru; |
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VM_BUG_ON_PAGE(PageActive(page) && PageUnevictable(page), page); |
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if (PageUnevictable(page)) |
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return LRU_UNEVICTABLE; |
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lru = page_is_file_lru(page) ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON; |
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if (PageActive(page)) |
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lru += LRU_ACTIVE; |
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return lru; |
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} |
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static __always_inline void add_page_to_lru_list(struct page *page, |
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struct lruvec *lruvec) |
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{ |
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enum lru_list lru = page_lru(page); |
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update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page)); |
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list_add(&page->lru, &lruvec->lists[lru]); |
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} |
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static __always_inline void add_page_to_lru_list_tail(struct page *page, |
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struct lruvec *lruvec) |
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{ |
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enum lru_list lru = page_lru(page); |
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update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page)); |
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list_add_tail(&page->lru, &lruvec->lists[lru]); |
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} |
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static __always_inline void del_page_from_lru_list(struct page *page, |
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struct lruvec *lruvec) |
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{ |
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list_del(&page->lru); |
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update_lru_size(lruvec, page_lru(page), page_zonenum(page), |
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-thp_nr_pages(page)); |
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} |
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#endif
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