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| author | Lee Schermerhorn <lee.schermerhorn@hp.com> | 2008-10-18 20:26:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-20 08:52:31 -0700 |
| commit | af936a1606246a10c145feac3770f6287f483f02 (patch) | |
| tree | 8b1ca7fabb5c749ffdecd654519889c6c2ed2fb6 /include | |
| parent | 64d6519dda3905dfb94d3f93c07c5f263f41813f (diff) | |
| download | linux-af936a1606246a10c145feac3770f6287f483f02.tar.bz2 | |
vmscan: unevictable LRU scan sysctl
This patch adds a function to scan individual or all zones' unevictable
lists and move any pages that have become evictable onto the respective
zone's inactive list, where shrink_inactive_list() will deal with them.
Adds sysctl to scan all nodes, and per node attributes to individual
nodes' zones.
Kosaki: If evictable page found in unevictable lru when write
/proc/sys/vm/scan_unevictable_pages, print filename and file offset of
these pages.
[akpm@linux-foundation.org: fix one CONFIG_MMU=n build error]
[kosaki.motohiro@jp.fujitsu.com: adapt vmscan-unevictable-lru-scan-sysctl.patch to new sysfs API]
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rmap.h | 3 | ||||
| -rw-r--r-- | include/linux/swap.h | 15 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index 955667e6a52d..1da48db8db09 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -75,6 +75,9 @@ void anon_vma_unlink(struct vm_area_struct *); void anon_vma_link(struct vm_area_struct *); void __anon_vma_link(struct vm_area_struct *); +extern struct anon_vma *page_lock_anon_vma(struct page *page); +extern void page_unlock_anon_vma(struct anon_vma *anon_vma); + /* * rmap interfaces called when adding or removing pte of page */ diff --git a/include/linux/swap.h b/include/linux/swap.h index 07eda69412fb..a3af95b2cb6d 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -7,6 +7,7 @@ #include <linux/list.h> #include <linux/memcontrol.h> #include <linux/sched.h> +#include <linux/node.h> #include <asm/atomic.h> #include <asm/page.h> @@ -235,15 +236,29 @@ static inline int zone_reclaim(struct zone *z, gfp_t mask, unsigned int order) #ifdef CONFIG_UNEVICTABLE_LRU extern int page_evictable(struct page *page, struct vm_area_struct *vma); extern void scan_mapping_unevictable_pages(struct address_space *); + +extern unsigned long scan_unevictable_pages; +extern int scan_unevictable_handler(struct ctl_table *, int, struct file *, + void __user *, size_t *, loff_t *); +extern int scan_unevictable_register_node(struct node *node); +extern void scan_unevictable_unregister_node(struct node *node); #else static inline int page_evictable(struct page *page, struct vm_area_struct *vma) { return 1; } + static inline void scan_mapping_unevictable_pages(struct address_space *mapping) { } + +static inline int scan_unevictable_register_node(struct node *node) +{ + return 0; +} + +static inline void scan_unevictable_unregister_node(struct node *node) { } #endif extern int kswapd_run(int nid); |