linux-kernel - Re: [PATCH 10/13] block, cfq: unlink cfq_io

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Date:	Wed, 26 Oct 2011 12:55:06 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	axboe@...nel.dk, ctalbott@...gle.com, rni@...gle.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/13] block, cfq: unlink cfq_io_context's immediately

Hello,

On Wed, Oct 26, 2011 at 03:48:57PM -0400, Vivek Goyal wrote:
> > +		ioc_release_depth_inc(cic->q);
> > +		cic->exit(cic);
> > +		cic->release(cic);
> > +		ioc_release_depth_dec(cic->q);
> 
> cic->release(cic) can free the cic? Are we accessing cic after freeing it
> up in ioc_release_depth_dec(cic->q);

As cic is RCU freed and we're running w/ irq disabled, this shouldn't
blow up, but yeah, I'll update it to use local variable instead.

Thanks.

-- 
tejun
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