linux-kernel - Re: [PATCH v5 2/7] crypto: SHA1 multibuffer crypto hash infrastructure

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Message-ID: <1406306844.2970.870.camel@schen9-DESK>
Date:	Fri, 25 Jul 2014 09:47:24 -0700
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	"H. Peter Anvin" <hpa@...or.com>,
	"David S.Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>,
	Chandramouli Narayanan <mouli@...ux.intel.com>,
	Vinodh Gopal <vinodh.gopal@...el.com>,
	James Guilford <james.guilford@...el.com>,
	Wajdi Feghali <wajdi.k.feghali@...el.com>,
	Jussi Kivilinna <jussi.kivilinna@....fi>,
	Thomas Gleixner <tglx@...utronix.de>,
	Tadeusz Struk <tadeusz.struk@...el.com>, tkhai@...dex.ru,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/7] crypto: SHA1 multibuffer crypto hash
 infrastructure

On Fri, 2014-07-25 at 09:26 +0200, Peter Zijlstra wrote:
> On Tue, Jul 22, 2014 at 03:09:32PM -0700, Tim Chen wrote:
> > This patch introduces the multi-buffer crypto daemon which is responsible
> > for submitting crypto jobs in a work queue to the responsible multi-buffer
> > crypto algorithm.  The idea of the multi-buffer algorihtm is to put
> > data streams from multiple jobs in a wide (AVX2) register and then
> > take advantage of SIMD instructions to do crypto computation on several
> > buffers simultaneously.
> > 
> > The multi-buffer crypto daemon is also responsbile for flushing the
> > remaining buffers to complete the computation if no new buffers arrive
> > for a while.
> 
> How is any of this SHA1 specific as the Subject says it is?

Yes, I should simply say multibuffer crypto hash infrastructure in the
subject line.

Tim


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