memory.current on the root level doesn't add anything that wouldn't be
more accurate and detailed using system statistics. It already doesn't
include slabs, and it'll be a pain to keep in sync when further memory
types are accounted in the memory controller. Remove it.
Note that this applies to the new unified hierarchy interface only.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
mm/memcontrol.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Tejun, we should probably do this with the other controllers too.
I don't think it makes sense anywhere to shoddily duplicate the
system statistics on the controller root levels.
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4f04510..c71fe40 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5022,7 +5022,7 @@ static void mem_cgroup_bind(struct cgroup_subsys_state *root_css)
static u64 memory_current_read(struct cgroup_subsys_state *css,
struct cftype *cft)
{
- return mem_cgroup_usage(mem_cgroup_from_css(css), false);
+ return page_counter_read(&mem_cgroup_from_css(css)->memory);
}
static int memory_low_show(struct seq_file *m, void *v)
@@ -5134,6 +5134,7 @@ static int memory_events_show(struct seq_file *m, void *v)
static struct cftype memory_files[] = {
{
.name = "current",
+ .flags = CFTYPE_NOT_ON_ROOT,
.read_u64 = memory_current_read,
},
{
--
2.6.1
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