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| author | Johannes Weiner <hannes@cmpxchg.org> | 2022-05-19 14:08:53 -0700 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-05-19 14:08:53 -0700 |
| commit | f6498b776d280b30a4614d8261840961e993c2c8 (patch) | |
| tree | b35704e2a62cc7630d06658fc6faaeba24b18e2a /mm/vmstat.c | |
| parent | b3fbd58fcbb10725a1314688e03b1af6827c42f9 (diff) | |
| download | lwn-f6498b776d280b30a4614d8261840961e993c2c8.tar.gz lwn-f6498b776d280b30a4614d8261840961e993c2c8.zip | |
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 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index b94a2e4723ff..da525bfb6f4a 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1396,6 +1396,10 @@ const char * const vmstat_text[] = { #ifdef CONFIG_KSM "cow_ksm", #endif +#ifdef CONFIG_ZSWAP + "zswpin", + "zswpout", +#endif #ifdef CONFIG_X86 "direct_map_level2_splits", "direct_map_level3_splits", |