Re: oom-killer causes lockups in cpuset_excl_nodes_overlap()

[Paul Jackson]

KUROSAWA Takahiro wrote:
>
> The oom-killer causes lockups because it calls
> cpuset_excl_nodes_overlap() with tasklist_lock read-locked.
> cpuset_excl_nodes_overlap() gets cpuset_sem (or callback_sem in
> later linux versions) semaphore, which might_sleep even if the
> semaphore could be down without sleeping.

Thank-you for catching this.  My apologies for not responding sooner.
I was off the air for a week.  I will look at this now.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@xxxxxxx> 1.925.600.0401
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