Re: [PATCH] cpusets: rework guarantee_online_cpus() to fixdeadlock with cpu_down()

[Oleg Nesterov]

Sorry for noise, forgot to mention...

On 08/01, Oleg Nesterov wrote:
>
> 	- adds cpuset->cpumask_lock, this lock is taken by
> 	  update_cpumask() around cpumask_copy(cs->cpus_allowed, newcpus).

Most probably there are other places where ->cpus_allowed is changed,
in that case they need ->cpumask_lock too. But this is trivial, the
patch I sent just explains what I meant.

Oleg.

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