linux-kernel - Re: [RFC/RFT PATCH 00/15] crypto: improved skcipher, aead, and hash tests

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Message-ID: <20190124102058.sj5rvthiigovvhzp@gondor.apana.org.au>
Date:   Thu, 24 Jan 2019 18:20:58 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Eric Biggers <ebiggers@...nel.org>,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Jason A . Donenfeld" <Jason@...c4.com>
Subject: Re: [RFC/RFT PATCH 00/15] crypto: improved skcipher, aead, and hash
 tests

On Thu, Jan 24, 2019 at 11:16:23AM +0100, Ard Biesheuvel wrote:
>
> OK, so how many adjacent physical pages is a scatterlist entry
> permitted to cover? Unbounded?

Well the network stack is limited by packet size so it's less than
64K for practical purposes.  However, the API itself doesn't specify
a limit as such.

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