diff mbox series

[RFC,v1,04/11] mm: Report top tier memory usage in sysfs

Message ID 1196182bf902e36c8ecbf2afb7dd570e96c99ff4.1617642417.git.tim.c.chen@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Manage the top tier memory in a tiered memory | expand

Commit Message

Tim Chen April 5, 2021, 5:08 p.m. UTC 
In memory cgroup's sysfs, report the memory cgroup's usage
of top tier memory in a new field: "toptier_usage_in_bytes".

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
---
 mm/memcontrol.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index fe7bb8613f5a..68590f46fa76 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3631,6 +3631,7 @@  enum {
 	RES_FAILCNT,
 	RES_SOFT_LIMIT,
 	RES_TOPTIER_SOFT_LIMIT,
+	RES_TOPTIER_USAGE,
 };
 
 static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css,
@@ -3673,6 +3674,8 @@  static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css,
 		return (u64)memcg->soft_limit * PAGE_SIZE;
 	case RES_TOPTIER_SOFT_LIMIT:
 		return (u64)memcg->toptier_soft_limit * PAGE_SIZE;
+	case RES_TOPTIER_USAGE:
+		return (u64)page_counter_read(&memcg->toptier) * PAGE_SIZE;
 	default:
 		BUG();
 	}
@@ -5073,6 +5076,11 @@  static struct cftype mem_cgroup_legacy_files[] = {
 		.write = mem_cgroup_write,
 		.read_u64 = mem_cgroup_read_u64,
 	},
+	{
+		.name = "toptier_usage_in_bytes",
+		.private = MEMFILE_PRIVATE(_MEM, RES_TOPTIER_USAGE),
+		.read_u64 = mem_cgroup_read_u64,
+	},
 	{
 		.name = "failcnt",
 		.private = MEMFILE_PRIVATE(_MEM, RES_FAILCNT),