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From: Namhyung Kim <namhyung@gmail.com>
To: NeilBrown <neilb@suse.de>
Cc: David Brown <david@westcontrol.com>, linux-raid@vger.kernel.org
Subject: Re: Triple-parity raid6
Date: Fri, 10 Jun 2011 12:22:14 +0900	[thread overview]
Message-ID: <87aadq5q1l.fsf@gmail.com> (raw)
In-Reply-To: <20110609220438.26336b27@notabene.brown> (NeilBrown's message of "Thu, 9 Jun 2011 22:04:38 +1000")

NeilBrown <neilb@suse.de> writes:
> On Thu, 09 Jun 2011 13:32:59 +0200 David Brown <david@westcontrol.com> wrote:
>
> You can see the current kernel code at:
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=lib/raid6;h=970c541a452d3b9983223d74b10866902f1a47c7;hb=HEAD
>
>
> int.uc is the generic C code which 'unroll.awk' processes to make various
> versions that unroll the loops different amounts to work with CPUs with
> different numbers of registers.
> Then there is sse1, sse2, altivec which provide the same functionality in
> assembler which is optimised for various processors.
>
> And 'recov' has the smarts for doing the reverse calculation when 2 data
> blocks, or 1 data and P are missing.
>
> Even if you don't feel up to implementing everything, a start might be
> useful.  You never know when someone might jump up and offer to help.
>

Maybe I could help David to some extent. :)

I'm gonna read the raid6 code next week and hope that there is a room I
can help with, FWIW.

Thanks.


-- 
Regards,
Namhyung Kim

  parent reply	other threads:[~2011-06-10  3:22 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-09  0:01 Triple-parity raid6 David Brown
2011-06-09  1:49 ` NeilBrown
2011-06-09 11:32   ` David Brown
2011-06-09 12:04     ` NeilBrown
2011-06-09 19:19       ` David Brown
2011-06-10  3:22       ` Namhyung Kim [this message]
2011-06-10  8:45         ` David Brown
2011-06-10 12:20           ` Christoph Dittmann
2011-06-10 14:28             ` David Brown
2011-06-11 10:13               ` Piergiorgio Sartor
2011-06-11 11:51                 ` David Brown
2011-06-11 13:18                   ` Piergiorgio Sartor
2011-06-11 14:53                     ` David Brown
2011-06-11 15:05                       ` Joe Landman
2011-06-11 16:31                         ` David Brown
2011-06-11 16:57                           ` Joe Landman
2011-06-12  9:05                             ` David Brown
2011-06-11 17:14                           ` Joe Landman
2011-06-11 18:05                             ` David Brown
2011-06-10  9:03       ` David Brown
2011-06-10 13:56       ` Bill Davidsen
2011-06-09 22:42 ` David Brown

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