memcg-doc-clarify-global-vs-limit-reclaims-fix

update doc as per Johannes

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 5ba92acc0e256269910f8c0387323bda936e014a..1e5f666b6df2855920ea65d05eb343a19c69ccfe 100644 (file)
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -241,17 +241,9 @@ global VM. Cgroups can get reclaimed basically under two conditions
    proportionally wrt. their LRU size in a round robin fashion
  - when a cgroup or its hierarchical parent (see 6. Hierarchical support)
    hits hard limit. If the reclaim is unsuccessful, an OOM routine is invoked
-   to select and kill the bulkiest task in the cgroup. (See 10. OOM Control
+   to select and kill the bulkiest task in the hiearchy. (See 10. OOM Control
    below.)
 
-Global and hard-limit reclaims share the same code the only difference
-is the objective of the reclaim. The global reclaim aims at balancing
-zones' watermarks while the limit reclaim frees some memory to allow new
-charges.
-
-NOTE: Hard limit reclaim does not work for the root cgroup, since we cannot set
-any limits on the root cgroup.
-
 Note2: When panic_on_oom is set to "2", the whole system will panic.
 
 When oom event notifier is registered, event will be delivered to the root