diff options
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index 4d559325d91..a5c6da5d8df 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -155,6 +155,15 @@ enum { #define SWAP_CLUSTER_MAX 32 #define COMPACT_CLUSTER_MAX SWAP_CLUSTER_MAX +/* + * Ratio between the present memory in the zone and the "gap" that + * we're allowing kswapd to shrink in addition to the per-zone high + * wmark, even for zones that already have the high wmark satisfied, + * in order to provide better per-zone lru behavior. We are ok to + * spend not more than 1% of the memory for this zone balancing "gap". + */ +#define KSWAPD_ZONE_BALANCE_GAP_RATIO 100 + #define SWAP_MAP_MAX 0x3e /* Max duplication count, in first swap_map */ #define SWAP_MAP_BAD 0x3f /* Note pageblock is bad, in first swap_map */ #define SWAP_HAS_CACHE 0x40 /* Flag page is cached, in first swap_map */ @@ -215,6 +224,7 @@ extern void mark_page_accessed(struct page *); extern void lru_add_drain(void); extern int lru_add_drain_all(void); extern void rotate_reclaimable_page(struct page *page); +extern void deactivate_page(struct page *page); extern void swap_setup(void); extern void add_page_to_unevictable_list(struct page *page); @@ -299,8 +309,6 @@ extern void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff, struct page **pagep, swp_entry_t *ent); #endif -extern void swap_unplug_io_fn(struct backing_dev_info *, struct page *); - #ifdef CONFIG_SWAP /* linux/mm/page_io.c */ extern int swap_readpage(struct page *); |