[PATCH 2/2] cgroup: docs: Add pswpin and pswpout items in cgroup v2 doc

[Hao Jia]

From: Hao Jia <jiahao1@xxxxxxxxxxx>

The commit 15ff4d409e1a ("mm/memcontrol: add per-memcg pgpgin/pswpin
counter") introduced the pswpin and pswpout items in the memory.stat
of cgroup v2. Therefore, update them accordingly in the cgroup-v2
documentation.

Signed-off-by: Hao Jia <jiahao1@xxxxxxxxxxx>
---
 Documentation/admin-guide/cgroup-v2.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index d6692607f80a..c0ae7a76005a 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1555,6 +1555,12 @@ The following nested keys are defined.
 	  workingset_nodereclaim
 		Number of times a shadow node has been reclaimed
 
+	  pswpin (npn)
+		Number of pages swapped into memory
+
+	  pswpout (npn)
+		Number of pages swapped out of memory
+
 	  pgscan (npn)
 		Amount of scanned pages (in an inactive LRU list)
 
-- 
2.34.1