linux-kernel - Re: __lock_task

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Message-ID: <20110328160446.4aeda49c@mfleming-mobl1.ger.corp.intel.com>
Date:	Mon, 28 Mar 2011 16:04:46 +0100
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: __lock_task_sighand() and RCU

On Mon, 28 Mar 2011 15:36:02 +0200
Oleg Nesterov <oleg@...hat.com> wrote:
 
> > But sighands aren't freed via
> > rcu,
> 
> it is ;)
> 
> > it's just a simple refcnt and kmem_cache_free()
> 
> Yes, but please note that sighand_cachep was created with
> SLAB_DESTROY_BY_RCU.

D'oh. I knew it would be something obvious like that.

Thanks Oleg!

-- 
Matt Fleming, Intel Open Source Technology Center
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