On Wed, 4 Dec 2013, Oleg Nesterov wrote:

> Change oom_kill.c to use for_each_thread() rather than the racy
> while_each_thread() which can loop forever if we race with exit.
> 
> Note also that most users were buggy even if while_each_thread()
> was fine, the task can exit even _before_ rcu_read_lock().
> 
> Fortunately the new for_each_thread() only requires the stable
> task_struct, so this change fixes both problems.
> 
> Signed-off-by: Oleg Nesterov <o...@redhat.com>
> Reviewed-and-Tested-by: Sergey Dyasly <dse...@gmail.com>
> Reviewed-by: Sameer Nanda <sna...@chromium.org>

Acked-by: David Rientjes <rient...@google.com>
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