From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/include/linux/mm_inline.h | 103 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 kernel/include/linux/mm_inline.h (limited to 'kernel/include/linux/mm_inline.h') diff --git a/kernel/include/linux/mm_inline.h b/kernel/include/linux/mm_inline.h new file mode 100644 index 000000000..cf55945c8 --- /dev/null +++ b/kernel/include/linux/mm_inline.h @@ -0,0 +1,103 @@ +#ifndef LINUX_MM_INLINE_H +#define LINUX_MM_INLINE_H + +#include +#include + +/** + * 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); +} + +static __always_inline void add_page_to_lru_list(struct page *page, + struct lruvec *lruvec, enum lru_list lru) +{ + int nr_pages = hpage_nr_pages(page); + mem_cgroup_update_lru_size(lruvec, lru, nr_pages); + list_add(&page->lru, &lruvec->lists[lru]); + __mod_zone_page_state(lruvec_zone(lruvec), NR_LRU_BASE + lru, nr_pages); +} + +static __always_inline void del_page_from_lru_list(struct page *page, + struct lruvec *lruvec, enum lru_list lru) +{ + int nr_pages = hpage_nr_pages(page); + mem_cgroup_update_lru_size(lruvec, lru, -nr_pages); + list_del(&page->lru); + __mod_zone_page_state(lruvec_zone(lruvec), NR_LRU_BASE + lru, -nr_pages); +} + +/** + * 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; +} + +/** + * 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; +} + +/** + * 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; +} + +#endif -- cgit 1.2.3-korg