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| author | Johannes Weiner <hannes@cmpxchg.org> | 2022-05-20 00:08:53 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-05-20 00:08:53 +0300 |
| commit | f6498b776d280b30a4614d8261840961e993c2c8 (patch) | |
| tree | b35704e2a62cc7630d06658fc6faaeba24b18e2a /Documentation/filesystems | |
| parent | b3fbd58fcbb10725a1314688e03b1af6827c42f9 (diff) | |
| download | linux-f6498b776d280b30a4614d8261840961e993c2c8.tar.xz | |
mm: zswap: add basic meminfo and vmstat coverage
Currently it requires poking at debugfs to figure out the size and
population of the zswap cache on a host. There are no counters for reads
and writes against the cache. As a result, it's difficult to understand
zswap behavior on production systems.
Print zswap memory consumption and how many pages are zswapped out in
/proc/meminfo. Count zswapouts and zswapins in /proc/vmstat.
Link: https://lkml.kernel.org/r/20220510152847.230957-6-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/proc.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 5e9791457876..cfec3cab0f9a 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -964,6 +964,8 @@ Example output. You may not have all of these fields. Mlocked: 0 kB SwapTotal: 0 kB SwapFree: 0 kB + Zswap: 1904 kB + Zswapped: 7792 kB Dirty: 12 kB Writeback: 0 kB AnonPages: 4654780 kB @@ -1055,6 +1057,10 @@ SwapTotal SwapFree Memory which has been evicted from RAM, and is temporarily on the disk +Zswap + Memory consumed by the zswap backend (compressed size) +Zswapped + Amount of anonymous memory stored in zswap (original size) Dirty Memory which is waiting to get written back to the disk Writeback |