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Message-Id: <766f5858d5427c0345a7bd55a16733b39022095c.1655242024.git.tim.c.chen@linux.intel.com>
Date: Tue, 14 Jun 2022 15:25:35 -0700
From: Tim Chen <tim.c.chen@...ux.intel.com>
To: linux-mm@...ck.org, akpm@...ux-foundation.org
Cc: Tim Chen <tim.c.chen@...ux.intel.com>, Wei Xu <weixugc@...gle.com>,
Huang Ying <ying.huang@...el.com>,
Greg Thelen <gthelen@...gle.com>,
Yang Shi <shy828301@...il.com>,
Davidlohr Bueso <dave@...olabs.net>,
Brice Goglin <brice.goglin@...il.com>,
Michal Hocko <mhocko@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Hesham Almatary <hesham.almatary@...wei.com>,
Dave Hansen <dave.hansen@...el.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Alistair Popple <apopple@...dia.com>,
Dan Williams <dan.j.williams@...el.com>,
Feng Tang <feng.tang@...el.com>,
Jagdish Gediya <jvgediya@...ux.ibm.com>,
Baolin Wang <baolin.wang@...ux.alibaba.com>,
David Rientjes <rientjes@...gle.com>,
"Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
Shakeel Butt <shakeelb@...gle.com>
Subject: [RFC PATCH 3/3] mm/memory-tiers: Show toptier memory usage for cgroup
Show toptier memory usage for a cgroup via sysfs:
/sys/fs/cgroup/<group>/memory.toptier
---
mm/memcontrol.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2f20ec2712b8..5fd1e3b686cd 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6205,6 +6205,14 @@ static u64 memory_current_read(struct cgroup_subsys_state *css,
return (u64)page_counter_read(&memcg->memory) * PAGE_SIZE;
}
+static u64 memory_toptier_read(struct cgroup_subsys_state *css,
+ struct cftype *cft)
+{
+ struct mem_cgroup *memcg = mem_cgroup_from_css(css);
+
+ return (u64)mem_cgroup_toptier_usage(memcg) * PAGE_SIZE;
+}
+
static u64 memory_peak_read(struct cgroup_subsys_state *css,
struct cftype *cft)
{
@@ -6516,6 +6524,11 @@ static struct cftype memory_files[] = {
.flags = CFTYPE_NOT_ON_ROOT,
.read_u64 = memory_current_read,
},
+ {
+ .name = "toptier",
+ .flags = CFTYPE_NOT_ON_ROOT,
+ .read_u64 = memory_toptier_read,
+ },
{
.name = "peak",
.flags = CFTYPE_NOT_ON_ROOT,
--
2.35.1
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