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Diffstat (limited to 'mm/page_owner.c')
-rw-r--r--mm/page_owner.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c
index 28dac73e0542..f7820357e4d4 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -10,6 +10,7 @@
#include <linux/migrate.h>
#include <linux/stackdepot.h>
#include <linux/seq_file.h>
+#include <linux/memcontrol.h>
#include <linux/sched/clock.h>
#include "internal.h"
@@ -325,6 +326,45 @@ void pagetypeinfo_showmixedcount_print(struct seq_file *m,
seq_putc(m, '\n');
}
+/*
+ * Looking for memcg information and print it out
+ */
+static inline int print_page_owner_memcg(char *kbuf, size_t count, int ret,
+ struct page *page)
+{
+#ifdef CONFIG_MEMCG
+ unsigned long memcg_data;
+ struct mem_cgroup *memcg;
+ bool online;
+ char name[80];
+
+ rcu_read_lock();
+ memcg_data = READ_ONCE(page->memcg_data);
+ if (!memcg_data)
+ goto out_unlock;
+
+ if (memcg_data & MEMCG_DATA_OBJCGS)
+ ret += scnprintf(kbuf + ret, count - ret,
+ "Slab cache page\n");
+
+ memcg = page_memcg_check(page);
+ if (!memcg)
+ goto out_unlock;
+
+ online = (memcg->css.flags & CSS_ONLINE);
+ cgroup_name(memcg->css.cgroup, name, sizeof(name));
+ ret += scnprintf(kbuf + ret, count - ret,
+ "Charged %sto %smemcg %s\n",
+ PageMemcgKmem(page) ? "(via objcg) " : "",
+ online ? "" : "offline ",
+ name);
+out_unlock:
+ rcu_read_unlock();
+#endif /* CONFIG_MEMCG */
+
+ return ret;
+}
+
static ssize_t
print_page_owner(char __user *buf, size_t count, unsigned long pfn,
struct page *page, struct page_owner *page_owner,
@@ -365,6 +405,8 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn,
migrate_reason_names[page_owner->last_migrate_reason]);
}
+ ret = print_page_owner_memcg(kbuf, count, ret, page);
+
ret += snprintf(kbuf + ret, count - ret, "\n");
if (ret >= count)
goto err;