cgroup: Add documentation for missing zswap memory.stat

This includes zswpin, zswpout and zswpwb.

Signed-off-by: Usama Arif <usamaarif642@gmail.com>
Acked-by: Nhat Pham <nphamcs@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20240502185307.3942173-2-usamaarif642@gmail.com>

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 17e6e9565156404e1adec007b20a31f097b20294..eaf9e66e472a38b25300ede5d34b2444451f063e 100644 (file)
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1572,6 +1572,15 @@ PAGE_SIZE multiple when read back.
          pglazyfreed (npn)
                Amount of reclaimed lazyfree pages
 
+         zswpin
+               Number of pages moved in to memory from zswap.
+
+         zswpout
+               Number of pages moved out of memory to zswap.
+
+         zswpwb
+               Number of pages written from zswap to swap.
+
          thp_fault_alloc (npn)
                Number of transparent hugepages which were allocated to satisfy
                a page fault. This counter is not present when CONFIG_TRANSPARENT_HUGEPAGE