linux-kernel - Re: arch/86: AVX RAID5 xor checksumming

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Message-ID: <20120411061442.2f839c77@notabene.brown>
Date:	Wed, 11 Apr 2012 06:14:42 +1000
From:	NeilBrown <neilb@...e.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Jim Kukunas <james.t.kukunas@...ux.intel.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, mingo@...hat.com, tglx@...utronix.de,
	linux-raid@...r.kernel.org
Subject: Re: arch/86: AVX RAID5 xor checksumming

On Tue, 10 Apr 2012 10:37:00 -0700 "H. Peter Anvin" <hpa@...or.com> wrote:

> On 04/10/2012 10:22 AM, Jim Kukunas wrote:
> > Hi Folks,
> > 
> > The following patch adds an AVX implementation of the RAID5 xor checksumming
> > functions.
> > 
> > Based on xor_speed, the AVX implementation appears to be ~32% faster than the
> > SSE implementation on my i7 2600:
> > 
> >         generic_sse: 15088.000 MB/sec
> > 	avx: 19936.000 MB/sec
> > 
> > Thanks.
> > 
> 
> I think this (and the SSSE3 patches for RAID-6) should go in via the
> RAID tree.  Neil, do you agree?

I'm happy to take the SSSE3 RAID-6 patches as they only affect lib/raid6, but
I felt that this one - being purely in arch/x86 - should probably go via the
x86 tree.
However I'm flexible and if you (collectively) are happy with these patches
going in through my tree, I'll do that.

Thanks,
NeilBrown

> 
> However,
> 
> Acked-by: H. Peter Anvin <hpa@...or.com>
> 
> 	-hpa


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