From: Herbert Xu <herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
Subject: Re: [PATCH v2 01/10] crypto: AF_ALG: add user space interface for
 AEAD
Date: Wed, 19 Nov 2014 12:27:04 +0800
Message-ID: <20141119042704.GA19258@gondor.apana.org.au>
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Cc: Daniel Borkmann <dborkman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, quentin.gouchet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
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To: Stephan Mueller <smueller-T9tCv8IpfcWELgA04lAiVw@public.gmane.org>
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On Wed, Nov 19, 2014 at 05:20:42AM +0100, Stephan Mueller wrote:
> 
> When looking deeper into skcipher_sendmsg, I see that the input data is copied 
> into the kernel using memcpy_fromiovec. The memory is allocated before the 
> memcpy call by skcipher_alloc_sgl.

Zero-copy is done through sendpage.

Cheers,
-- 
Email: Herbert Xu <herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org>
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