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| author | Minchan Kim <minchan.kim@gmail.com> | 2011-10-31 17:06:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-31 17:30:44 -0700 |
| commit | 4356f21d09283dc6d39a6f7287a65ddab61e2808 (patch) | |
| tree | 34822a1662ea83291455834556a4fb5bf98ecd72 /include/linux | |
| parent | b9e84ac1536d35aee03b2601f19694949f0bd506 (diff) | |
| download | op-kernel-dev-4356f21d09283dc6d39a6f7287a65ddab61e2808.zip op-kernel-dev-4356f21d09283dc6d39a6f7287a65ddab61e2808.tar.gz | |
mm: change isolate mode from #define to bitwise type
Change ISOLATE_XXX macro with bitwise isolate_mode_t type. Normally,
macro isn't recommended as it's type-unsafe and making debugging harder as
symbol cannot be passed throught to the debugger.
Quote from Johannes
" Hmm, it would probably be cleaner to fully convert the isolation mode
into independent flags. INACTIVE, ACTIVE, BOTH is currently a
tri-state among flags, which is a bit ugly."
This patch moves isolate mode from swap.h to mmzone.h by memcontrol.h
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memcontrol.h | 3 | ||||
| -rw-r--r-- | include/linux/mmzone.h | 8 | ||||
| -rw-r--r-- | include/linux/swap.h | 7 |
3 files changed, 11 insertions, 7 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 343bd76..ac797fa 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -35,7 +35,8 @@ enum mem_cgroup_page_stat_item { extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, struct list_head *dst, unsigned long *scanned, int order, - int mode, struct zone *z, + isolate_mode_t mode, + struct zone *z, struct mem_cgroup *mem_cont, int active, int file); diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index be1ac8d..436ce6e 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -164,6 +164,14 @@ static inline int is_unevictable_lru(enum lru_list l) #define LRU_ALL_EVICTABLE (LRU_ALL_FILE | LRU_ALL_ANON) #define LRU_ALL ((1 << NR_LRU_LISTS) - 1) +/* Isolate inactive pages */ +#define ISOLATE_INACTIVE ((__force isolate_mode_t)0x1) +/* Isolate active pages */ +#define ISOLATE_ACTIVE ((__force isolate_mode_t)0x2) + +/* LRU Isolation modes. */ +typedef unsigned __bitwise__ isolate_mode_t; + enum zone_watermarks { WMARK_MIN, WMARK_LOW, diff --git a/include/linux/swap.h b/include/linux/swap.h index c71f84b..1e22e12 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -243,15 +243,10 @@ static inline void lru_cache_add_file(struct page *page) __lru_cache_add(page, LRU_INACTIVE_FILE); } -/* LRU Isolation modes. */ -#define ISOLATE_INACTIVE 0 /* Isolate inactive pages. */ -#define ISOLATE_ACTIVE 1 /* Isolate active pages. */ -#define ISOLATE_BOTH 2 /* Isolate both active and inactive pages. */ - /* linux/mm/vmscan.c */ extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *mask); -extern int __isolate_lru_page(struct page *page, int mode, int file); +extern int __isolate_lru_page(struct page *page, isolate_mode_t mode, int file); extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem, gfp_t gfp_mask, bool noswap); extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem, |
