linux-kernel - Re: [RFC][PATCH] sched: Fix a deadlock of cpu-hotplug

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Date:	Wed, 24 Oct 2012 21:12:24 +0800 (CST)
From:	陈华才 <chenhc@...ote.com>
To:	"Peter Zijlstra" <peterz@...radead.org>
Cc:	"Ingo Molnar" <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	"Fuxin Zhang" <zhangfx@...ote.com>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	"Tejun Heo" <tj@...nel.org>
Subject: Re: [RFC][PATCH] sched: Fix a deadlock of cpu-hotplug


> On Wed, 2012-10-24 at 20:34 +0800, 陈华才 wrote:
>> I see, this is an arch-specific bug, sorry for my carelessness and thank
>> you for your tips.
>
> What arch are you using? And what exactly did the arch do wrong? Most of
> the code involved seems to be common code.
>
> Going by c0_compare_interrupt, this is some MIPS device.
>
Yes, I'm use MIPS, In a place which local_irq_save()/local_irq_restore()
should be used, I use local_irq_disable()/local_irq_enable() by mistake.


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