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Message-Id: <1335296038-29297-1-git-send-email-hannes@cmpxchg.org>
Date: Tue, 24 Apr 2012 21:33:58 +0200
From: Johannes Weiner <hannes@...xchg.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...e.cz>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Ying Han <yinghan@...gle.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
linux-mm@...ck.org, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [patch] Documentation: memcg: future proof hierarchical statistics documentation
The hierarchical versions of per-memcg counters in memory.stat are all
calculated the same way and are all named total_<counter>.
Documenting the pattern is easier for maintenance than listing each
counter twice.
Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Michal Hocko <mhocko@...e.cz>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Acked-by: Ying Han <yinghan@...gle.com>
---
Documentation/cgroups/memory.txt | 15 ++++-----------
1 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index ab34ae5..6a066a2 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -432,17 +432,10 @@ hierarchical_memory_limit - # of bytes of memory limit with regard to hierarchy
hierarchical_memsw_limit - # of bytes of memory+swap limit with regard to
hierarchy under which memory cgroup is.
-total_cache - sum of all children's "cache"
-total_rss - sum of all children's "rss"
-total_mapped_file - sum of all children's "cache"
-total_pgpgin - sum of all children's "pgpgin"
-total_pgpgout - sum of all children's "pgpgout"
-total_swap - sum of all children's "swap"
-total_inactive_anon - sum of all children's "inactive_anon"
-total_active_anon - sum of all children's "active_anon"
-total_inactive_file - sum of all children's "inactive_file"
-total_active_file - sum of all children's "active_file"
-total_unevictable - sum of all children's "unevictable"
+total_<counter> - # hierarchical version of <counter>, which in
+ addition to the cgroup's own value includes the
+ sum of all hierarchical children's values of
+ <counter>, i.e. total_cache
# The following additional stats are dependent on CONFIG_DEBUG_VM.
--
1.7.7.6
--
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