From 4f98a2fee8acdb4ac84545df98cccecfd130f8db Mon Sep 17 00:00:00 2001 From: Rik van Riel Date: Sat, 18 Oct 2008 20:26:32 -0700 Subject: vmscan: split LRU lists into anon & file sets Split the LRU lists in two, one set for pages that are backed by real file systems ("file") and one for pages that are backed by memory and swap ("anon"). The latter includes tmpfs. The advantage of doing this is that the VM will not have to scan over lots of anonymous pages (which we generally do not want to swap out), just to find the page cache pages that it should evict. This patch has the infrastructure and a basic policy to balance how much we scan the anon lists and how much we scan the file lists. The big policy changes are in separate patches. [lee.schermerhorn@hp.com: collect lru meminfo statistics from correct offset] [kosaki.motohiro@jp.fujitsu.com: prevent incorrect oom under split_lru] [kosaki.motohiro@jp.fujitsu.com: fix pagevec_move_tail() doesn't treat unevictable page] [hugh@veritas.com: memcg swapbacked pages active] [hugh@veritas.com: splitlru: BDI_CAP_SWAP_BACKED] [akpm@linux-foundation.org: fix /proc/vmstat units] [nishimura@mxp.nes.nec.co.jp: memcg: fix handling of shmem migration] [kosaki.motohiro@jp.fujitsu.com: adjust Quicklists field of /proc/meminfo] [kosaki.motohiro@jp.fujitsu.com: fix style issue of get_scan_ratio()] Signed-off-by: Rik van Riel Signed-off-by: Lee Schermerhorn Signed-off-by: KOSAKI Motohiro Signed-off-by: Hugh Dickins Signed-off-by: Daisuke Nishimura Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/swap.h | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) (limited to 'include/linux/swap.h') diff --git a/include/linux/swap.h b/include/linux/swap.h index 833be56ad835..7d09d79997a4 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -184,14 +184,24 @@ extern void swap_setup(void); * lru_cache_add: add a page to the page lists * @page: the page to add */ -static inline void lru_cache_add(struct page *page) +static inline void lru_cache_add_anon(struct page *page) { - __lru_cache_add(page, LRU_INACTIVE); + __lru_cache_add(page, LRU_INACTIVE_ANON); } -static inline void lru_cache_add_active(struct page *page) +static inline void lru_cache_add_active_anon(struct page *page) { - __lru_cache_add(page, LRU_ACTIVE); + __lru_cache_add(page, LRU_ACTIVE_ANON); +} + +static inline void lru_cache_add_file(struct page *page) +{ + __lru_cache_add(page, LRU_INACTIVE_FILE); +} + +static inline void lru_cache_add_active_file(struct page *page) +{ + __lru_cache_add(page, LRU_ACTIVE_FILE); } /* linux/mm/vmscan.c */ @@ -199,7 +209,7 @@ extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask); extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem, gfp_t gfp_mask); -extern int __isolate_lru_page(struct page *page, int mode); +extern int __isolate_lru_page(struct page *page, int mode, int file); extern unsigned long shrink_all_memory(unsigned long nr_pages); extern int vm_swappiness; extern int remove_mapping(struct address_space *mapping, struct page *page); -- cgit v1.2.3