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Date: Thu, 01 Mar 2012 09:38:31 +0800 From: Li Zefan <lizf@...fujitsu.com> To: Johannes Weiner <hannes@...xchg.org> CC: Konstantin Khlebnikov <khlebnikov@...nvz.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [patch 1/2] kernel: cgroup: push rcu read locking from css_is_ancestor() to callsite 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@...xchg.org> Acked-by: Li Zefan <lizf@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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