linux-kernel - Re: [PATCH -mm 3/4][AIO] - AIO completion signal notification

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Message-ID: <20061123112741.44ef3be1@frecb000686>
Date:	Thu, 23 Nov 2006 11:27:41 +0100
From:	Sébastien Dugué <sebastien.dugue@...l.net>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-aio <linux-aio@...ck.org>,
	Suparna Bhattacharya <suparna@...ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Zach Brown <zach.brown@...cle.com>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Jean Pierre Dion <jean-pierre.dion@...l.net>,
	Ulrich Drepper <drepper@...hat.com>
Subject: Re: [PATCH -mm 3/4][AIO] - AIO completion signal notification

On Thu, 23 Nov 2006 02:14:37 -0800
Andrew Morton <akpm@...l.org> wrote:

[snip]

> Look:
> 
> > +	notify->target = target;
> > +
> > +	if (notify->notify == (SIGEV_SIGNAL|SIGEV_THREAD_ID)) {
> > +		/*
> > +		 * This reference will be dropped in really_put_req() when
> > +		 * we're done with the request.
> > +		 */
> > +		get_task_struct(target);
> 
> If that test fails, we've saved a pointer to the task_struct without having
> taken a refreence on it.
> 

  Aggreed, just wanted to make sure.

  Thanks,

  Sébastien.
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