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| author | Balbir Singh <balbir@linux.vnet.ibm.com> | 2009-09-23 15:56:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-24 07:20:59 -0700 |
| commit | 75822b4495b62e8721e9b88e3cf9e653a0c85b73 (patch) | |
| tree | b8d4c10f03a4e289f0a66b982243fd8980f9df07 /mm | |
| parent | f64c3f54940d6929a2b6dcffaab942bd62be2e66 (diff) | |
| download | linux-75822b4495b62e8721e9b88e3cf9e653a0c85b73.tar.gz | |
memory controller: soft limit refactor reclaim flags
Refactor mem_cgroup_hierarchical_reclaim() Refactor the arguments passed to mem_cgroup_hierarchical_reclaim() into flags, so that new parameters don't have to be passed as we make the reclaim routine more flexible Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 0ed325943cd1..90f0b13e1c3c 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -252,6 +252,14 @@ enum charge_type { #define MEMFILE_TYPE(val) (((val) >> 16) & 0xffff) #define MEMFILE_ATTR(val) ((val) & 0xffff) +/* + * Reclaim flags for mem_cgroup_hierarchical_reclaim + */ +#define MEM_CGROUP_RECLAIM_NOSWAP_BIT 0x0 +#define MEM_CGROUP_RECLAIM_NOSWAP (1 << MEM_CGROUP_RECLAIM_NOSWAP_BIT) +#define MEM_CGROUP_RECLAIM_SHRINK_BIT 0x1 +#define MEM_CGROUP_RECLAIM_SHRINK (1 << MEM_CGROUP_RECLAIM_SHRINK_BIT) + static void mem_cgroup_get(struct mem_cgroup *mem); static void mem_cgroup_put(struct mem_cgroup *mem); static struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *mem); @@ -1029,11 +1037,14 @@ mem_cgroup_select_victim(struct mem_cgroup *root_mem) * If shrink==true, for avoiding to free too much, this returns immedieately. */ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem, - gfp_t gfp_mask, bool noswap, bool shrink) + gfp_t gfp_mask, + unsigned long reclaim_options) { struct mem_cgroup *victim; int ret, total = 0; int loop = 0; + bool noswap = reclaim_options & MEM_CGROUP_RECLAIM_NOSWAP; + bool shrink = reclaim_options & MEM_CGROUP_RECLAIM_SHRINK; /* If memsw_is_minimum==1, swap-out is of-no-use. */ if (root_mem->memsw_is_minimum) @@ -1171,7 +1182,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm, while (1) { int ret; - bool noswap = false; + unsigned long flags = 0; ret = res_counter_charge(&mem->res, PAGE_SIZE, &fail_res, &soft_fail_res); @@ -1184,7 +1195,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm, break; /* mem+swap counter fails */ res_counter_uncharge(&mem->res, PAGE_SIZE, NULL); - noswap = true; + flags |= MEM_CGROUP_RECLAIM_NOSWAP; mem_over_limit = mem_cgroup_from_res_counter(fail_res, memsw); } else @@ -1196,7 +1207,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm, goto nomem; ret = mem_cgroup_hierarchical_reclaim(mem_over_limit, gfp_mask, - noswap, false); + flags); if (ret) continue; @@ -2008,7 +2019,7 @@ static int mem_cgroup_resize_limit(struct mem_cgroup *memcg, break; progress = mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL, - false, true); + MEM_CGROUP_RECLAIM_SHRINK); curusage = res_counter_read_u64(&memcg->res, RES_USAGE); /* Usage is reduced ? */ if (curusage >= oldusage) @@ -2060,7 +2071,9 @@ static int mem_cgroup_resize_memsw_limit(struct mem_cgroup *memcg, if (!ret) break; - mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL, true, true); + mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL, + MEM_CGROUP_RECLAIM_NOSWAP | + MEM_CGROUP_RECLAIM_SHRINK); curusage = res_counter_read_u64(&memcg->memsw, RES_USAGE); /* Usage is reduced ? */ if (curusage >= oldusage) |