linux-ext4 - Re: [PATCH v4] crc32c: Implement CRC32c with slicing-by-8 algorithm

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Message-ID: <20111004235446.GC12447@tux1.beaverton.ibm.com>
Date:	Tue, 4 Oct 2011 16:54:46 -0700
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Joakim Tjernlund <joakim.tjernlund@...nsmode.se>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Mingming Cao <cmm@...ibm.com>,
	David Miller <davem@...emloft.net>,
	linux-crypto <linux-crypto@...r.kernel.org>,
	linux-ext4@...r.kernel.org,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bob Pearson <rpearson@...temfabricworks.com>,
	Theodore Tso <tytso@....edu>
Subject: Re: [PATCH v4] crc32c: Implement CRC32c with slicing-by-8 algorithm

On Tue, Oct 04, 2011 at 07:59:53AM +0100, Herbert Xu wrote:
> On Mon, Oct 03, 2011 at 05:55:10PM -0700, Darrick J. Wong wrote:
> >
> > So what I think I'm hearing is...
> > 
> > 1. Apply Bob's slice-by-8 algorithm patch to regular crc32.
> > 2. Adapt crc32's build code to generate crc32c as well.
> > 3. Remove crypto/crc32c.c's implementation and have it wrap the code generated
> >    by #2.
> > 4. Retain the current libcrc32c.  I guess if you don't configure CRYPTO and
> >    CRYPTO_CRC32C then it could also just reference the generated crc32c functions
> >    directly.
> > 
> > Is this a satisfactory way to move forward?
> 
> All good except that you don't really have to touch libcrc32c
> at all.

Ok, let's see what you think of my v5 patchset. :)

--D
> 
> Cheers,
> -- 
> Email: Herbert Xu <herbert@...dor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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