linux-kernel - Re: Deadlock between cpu_hotplug_begin and cpu_add_remove

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Message-ID: <87r47z2zxu.fsf@rustcorp.com.au>
Date:	Thu, 23 Jan 2014 12:59:33 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Paul Mackerras <paulus@...ba.org>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Michel Lespinasse <walken@...gle.com>, ego@...ux.vnet.ibm.com,
	Thomas Gleixner <tglx@...utronix.de>,
	"akpm\@linux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: Deadlock between cpu_hotplug_begin and cpu_add_remove_lock

"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com> writes:
> On 01/22/2014 02:00 PM, Srivatsa S. Bhat wrote:
>> Hi Paul,

I find an old patch for register_allcpu_notifier(), but the "bool
replay_history" should be eliminated (always true): it's too weird.

Then we should get rid of register_cpu_notifier, or at least hide it.

Thanks,
Rusty.
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