Messages in this thread | | | Date | Thu, 01 Mar 2012 09:38:31 +0800 | From | Li Zefan <> | Subject | Re: [patch 1/2] kernel: cgroup: push rcu read locking from css_is_ancestor() to callsite |
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Johannes Weiner wrote: > Library functions should not grab locks when the callsites can do it, > even if the lock nests like the rcu read-side lock does. > > Push the rcu_read_lock() from css_is_ancestor() to its single user, > mem_cgroup_same_or_subtree() in preparation for another user that may > already hold the rcu read-side lock. > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
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