linux-kernel - Re: [PATCH] DM-CRYPT: Scale to multiple CPUs

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Message-ID: <20100531174611.GF10766@basil.fritz.box>
Date:	Mon, 31 May 2010 19:46:11 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, herbert@...dor.apana.org.au,
	dm-devel@...hat.com, linux-kernel@...r.kernel.org, agk@...hat.com,
	ak@...ux.intel.com
Subject: Re: [PATCH] DM-CRYPT: Scale to multiple CPUs

On Mon, May 31, 2010 at 06:34:55PM +0200, Eric Dumazet wrote:

Yes seems like I'm behind on per cpu innovations.

> Since commit e0fdb0e050eae331, we have a __percpu annotation so that
> sparse can be augmented. This would also make the comment unnecessary...

I think the comment is still necessary.

> 
> > +       __get_cpu_var(io_wq_cpu) = current;
> 
> 	this_cpu_write(io_wq_cpu, current)

And this one looks more ugly than before and does not seem
to generate better code, so I decided to skip it.

Thanks.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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