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-rw-r--r--mm/memcontrol.c54
1 files changed, 32 insertions, 22 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b00ec74a4c18..5f8f93d83edf 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2857,40 +2857,50 @@ mem_cgroup_get_recursive_idx_stat(struct mem_cgroup *mem,
*val = d.val;
}
+static inline u64 mem_cgroup_usage(struct mem_cgroup *mem, bool swap)
+{
+ u64 idx_val, val;
+
+ if (!mem_cgroup_is_root(mem)) {
+ if (!swap)
+ return res_counter_read_u64(&mem->res, RES_USAGE);
+ else
+ return res_counter_read_u64(&mem->memsw, RES_USAGE);
+ }
+
+ mem_cgroup_get_recursive_idx_stat(mem, MEM_CGROUP_STAT_CACHE, &idx_val);
+ val = idx_val;
+ mem_cgroup_get_recursive_idx_stat(mem, MEM_CGROUP_STAT_RSS, &idx_val);
+ val += idx_val;
+
+ if (swap) {
+ mem_cgroup_get_recursive_idx_stat(mem,
+ MEM_CGROUP_STAT_SWAPOUT, &idx_val);
+ val += idx_val;
+ }
+
+ return val << PAGE_SHIFT;
+}
+
static u64 mem_cgroup_read(struct cgroup *cont, struct cftype *cft)
{
struct mem_cgroup *mem = mem_cgroup_from_cont(cont);
- u64 idx_val, val;
+ u64 val;
int type, name;
type = MEMFILE_TYPE(cft->private);
name = MEMFILE_ATTR(cft->private);
switch (type) {
case _MEM:
- if (name == RES_USAGE && mem_cgroup_is_root(mem)) {
- mem_cgroup_get_recursive_idx_stat(mem,
- MEM_CGROUP_STAT_CACHE, &idx_val);
- val = idx_val;
- mem_cgroup_get_recursive_idx_stat(mem,
- MEM_CGROUP_STAT_RSS, &idx_val);
- val += idx_val;
- val <<= PAGE_SHIFT;
- } else
+ if (name == RES_USAGE)
+ val = mem_cgroup_usage(mem, false);
+ else
val = res_counter_read_u64(&mem->res, name);
break;
case _MEMSWAP:
- if (name == RES_USAGE && mem_cgroup_is_root(mem)) {
- mem_cgroup_get_recursive_idx_stat(mem,
- MEM_CGROUP_STAT_CACHE, &idx_val);
- val = idx_val;
- mem_cgroup_get_recursive_idx_stat(mem,
- MEM_CGROUP_STAT_RSS, &idx_val);
- val += idx_val;
- mem_cgroup_get_recursive_idx_stat(mem,
- MEM_CGROUP_STAT_SWAPOUT, &idx_val);
- val += idx_val;
- val <<= PAGE_SHIFT;
- } else
+ if (name == RES_USAGE)
+ val = mem_cgroup_usage(mem, true);
+ else
val = res_counter_read_u64(&mem->memsw, name);
break;
default:
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