From: Herbert Xu <herbert@gondor.apana.org.au>
To: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Cc: linux-crypto@vger.kernel.org
Subject: Re: hash finup() issue
Date: Thu, 27 Jan 2011 09:32:17 +1000 [thread overview]
Message-ID: <20110126233217.GA26664@gondor.apana.org.au> (raw)
In-Reply-To: <4D3FD18F.2020905@nokia.com>
On Wed, Jan 26, 2011 at 09:47:27AM +0200, Dmitry Kasatkin wrote:
> I am not talking about user space API at all.
>
> I talk about kernel crypto API and kernel clients.
>
> Please understand the following: when update() is called driver does not
> know if it is last update or not...
> That is essential.
> If client code would always use update/finup then it is fine..
> But original API and clients uses update/final...
> That is why some way (flag) needed to tell if finup() will be used or not...
>
> It gave up 20% performance improvement in some case because no extra
> memcpy has been done...
>
> If you think about other solution, please share...
If the crypto user can set the FINUP flag then it can just call
finup, simple.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2011-01-26 23:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-25 13:44 hash finup() issue Dmitry Kasatkin
2011-01-25 23:29 ` Herbert Xu
2011-01-26 7:47 ` Dmitry Kasatkin
2011-01-26 23:32 ` Herbert Xu [this message]
2011-01-27 6:47 ` Dmitry Kasatkin
2011-01-27 7:18 ` Herbert Xu
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