cregit-Linux how code gets into the kernel

Release 4.7 include/linux/mm_inline.h

Directory: include/linux
#ifndef LINUX_MM_INLINE_H

#define LINUX_MM_INLINE_H

#include <linux/huge_mm.h>
#include <linux/swap.h>

/**
 * page_is_file_cache - should the page be on a file LRU or anon LRU?
 * @page: the page to test
 *
 * Returns 1 if @page is page cache page backed by a regular filesystem,
 * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
 * Used by functions that manipulate the LRU lists, to sort a page
 * onto the right LRU list.
 *
 * We would like to get this info without a page flag, but the state
 * needs to survive until the page is last deleted from the LRU, which
 * could be as far down as __page_cache_release.
 */



static inline int page_is_file_cache(struct page *page)
{
	return !PageSwapBacked(page);
}


Contributors
PersonTokensPropCommitsCommitProp
rik van rielrik van riel1789.47%150.00%


johannes weinerjohannes weiner210.53%150.00%


Total19100.00%2100.00%






static __always_inline void __update_lru_size(struct lruvec *lruvec,
				enum lru_list lru, int nr_pages)
{
	__mod_zone_page_state(lruvec_zone(lruvec), NR_LRU_BASE + lru, nr_pages);
}


Contributors
PersonTokensPropCommitsCommitProp
hugh dickinshugh dickins33100.00%1100.00%


Total33100.00%1100.00%






static __always_inline void update_lru_size(struct lruvec *lruvec,
				enum lru_list lru, int nr_pages)
{
#ifdef CONFIG_MEMCG
	mem_cgroup_update_lru_size(lruvec, lru, nr_pages);
#else
	__update_lru_size(lruvec, lru, nr_pages);
#endif
}


Contributors
PersonTokensPropCommitsCommitProp
hugh dickinshugh dickins44100.00%1100.00%


Total44100.00%1100.00%






static __always_inline void add_page_to_lru_list(struct page *page,
				struct lruvec *lruvec, enum lru_list lru)
{
	update_lru_size(lruvec, lru, hpage_nr_pages(page));
	list_add(&page->lru, &lruvec->lists[lru]);
}


Contributors
PersonTokensPropCommitsCommitProp
andrew mortonandrew morton2040.82%114.29%


hugh dickinshugh dickins1530.61%342.86%


johannes weinerjohannes weiner1020.41%114.29%


christoph lameterchristoph lameter36.12%114.29%


konstantin khlebnikovkonstantin khlebnikov12.04%114.29%


Total49100.00%7100.00%






static __always_inline void del_page_from_lru_list(struct page *page,
				struct lruvec *lruvec, enum lru_list lru)
{
	list_del(&page->lru);
	update_lru_size(lruvec, lru, -hpage_nr_pages(page));
}


Contributors
PersonTokensPropCommitsCommitProp
hugh dickinshugh dickins2354.76%444.44%


andrea arcangeliandrea arcangeli1228.57%111.11%


andrew mortonandrew morton49.52%111.11%


johannes weinerjohannes weiner12.38%111.11%


christoph lameterchristoph lameter12.38%111.11%


konstantin khlebnikovkonstantin khlebnikov12.38%111.11%


Total42100.00%9100.00%



/**
 * page_lru_base_type - which LRU list type should a page be on?
 * @page: the page to test
 *
 * Used for LRU list index arithmetic.
 *
 * Returns the base LRU type - file or anon - @page should be on.
 */



static inline enum lru_list page_lru_base_type(struct page *page)
{
	if (page_is_file_cache(page))
		return LRU_INACTIVE_FILE;
	return LRU_INACTIVE_ANON;
}


Contributors
PersonTokensPropCommitsCommitProp
johannes weinerjohannes weiner26100.00%1100.00%


Total26100.00%1100.00%



/**
 * page_off_lru - which LRU list was page on? clearing its lru flags.
 * @page: the page to test
 *
 * Returns the LRU list a page was on, as an index into the array of LRU
 * lists; and clears its Unevictable or Active flags, ready for freeing.
 */



static __always_inline enum lru_list page_off_lru(struct page *page)
{
	enum lru_list lru;

	if (PageUnevictable(page)) {
		__ClearPageUnevictable(page);
		lru = LRU_UNEVICTABLE;
	} else {
		lru = page_lru_base_type(page);
		if (PageActive(page)) {
			__ClearPageActive(page);
			lru += LRU_ACTIVE;
		}
	}
	return lru;
}


Contributors
PersonTokensPropCommitsCommitProp
andrew mortonandrew morton2131.82%111.11%


lee schermerhornlee schermerhorn2030.30%111.11%


hugh dickinshugh dickins1015.15%222.22%


christoph lameterchristoph lameter69.09%111.11%


johannes weinerjohannes weiner69.09%111.11%


konstantin khlebnikovkonstantin khlebnikov11.52%111.11%


nick pigginnick piggin11.52%111.11%


rik van rielrik van riel11.52%111.11%


Total66100.00%9100.00%



/**
 * page_lru - which LRU list should a page be on?
 * @page: the page to test
 *
 * Returns the LRU list a page should be on, as an index
 * into the array of LRU lists.
 */



static __always_inline enum lru_list page_lru(struct page *page)
{
	enum lru_list lru;

	if (PageUnevictable(page))
		lru = LRU_UNEVICTABLE;
	else {
		lru = page_lru_base_type(page);
		if (PageActive(page))
			lru += LRU_ACTIVE;
	}
	return lru;
}


Contributors
PersonTokensPropCommitsCommitProp
christoph lameterchristoph lameter2751.92%233.33%


lee schermerhornlee schermerhorn1426.92%116.67%


johannes weinerjohannes weiner713.46%116.67%


andrew mortonandrew morton35.77%116.67%


konstantin khlebnikovkonstantin khlebnikov11.92%116.67%


Total52100.00%6100.00%




#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))

#endif

Overall Contributors
PersonTokensPropCommitsCommitProp
hugh dickinshugh dickins12635.39%525.00%


johannes weinerjohannes weiner5415.17%315.00%


andrew mortonandrew morton4813.48%15.00%


christoph lameterchristoph lameter3810.67%210.00%


lee schermerhornlee schermerhorn349.55%15.00%


rik van rielrik van riel298.15%315.00%


andrea arcangeliandrea arcangeli123.37%15.00%


geliang tanggeliang tang71.97%15.00%


konstantin khlebnikovkonstantin khlebnikov41.12%15.00%


lisa dulisa du30.84%15.00%


nick pigginnick piggin10.28%15.00%


Total356100.00%20100.00%

  
Directory: include/linux



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