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Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.

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From: Herbert Xu <herbert@...>
To: Chris Mason <chris.mason@...>
Cc: <herbert@...>, <dwmw2@...>, <austin_zhang@...>, <davem@...>, <linux-kernel@...>, <linux-crypto@...>
Subject: Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC32c algorithm by new crypto API.
Date: Monday, August 4, 2008 - 12:45 pm

Chris Mason <chris.mason@oracle.com> wrote:

The existing users are iSCSI, SCTP, Infiniband, all of which are
clearly crucial in the embedded space :)


Well then you're going to have to do the check on every call.

Seriously, I'm happy to trim off any fat from the crypto API for the
embedded space.  For a start, if you only needed hashing then we
could do without the legacy cipher/compress support.  That shaves
off 800 bytes on i386.  There is also still some legacy code in
api.c itself.  Getting rid of them should get us to around 2K.

On the other hand, one of the advantages of doing it through the
crypto API is that this kind of selection is useful for quite a
few operations, e.g., xor or even memcpy.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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Messages in current thread:
[PATCH] Using Intel CRC32 instruction to accelerate CRC32c a..., Austin Zhang, (Mon Aug 4, 5:35 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Randy Dunlap, (Mon Aug 4, 1:27 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 6:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:19 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 5:59 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Tue Aug 5, 6:44 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:18 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 10:13 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Tue Aug 5, 5:51 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:17 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Mon Aug 4, 6:35 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:45 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Chris Mason, (Mon Aug 4, 9:45 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 11:42 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Benoit Boissinot, (Mon Aug 4, 2:02 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:08 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Chris Mason, (Mon Aug 4, 12:14 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 12:45 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Arjan van de Ven, (Mon Aug 4, 1:06 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 1:10 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 1:13 pm)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Helge Hafting, (Tue Aug 5, 7:10 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Tue Aug 5, 10:04 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:04 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Arjan van de Ven, (Mon Aug 4, 10:20 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 11:12 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 10:49 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 10:54 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Austin Zhang, (Mon Aug 4, 6:58 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 7:25 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Sebastian Siewior, (Mon Aug 4, 6:25 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., Herbert Xu, (Mon Aug 4, 6:48 am)
Re: [PATCH] Using Intel CRC32 instruction to accelerate CRC3..., David Woodhouse, (Mon Aug 4, 6:27 am)