linux-kernel - Re: drivers/char/random.c: More futzing about

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Date:	Wed, 11 Jun 2014 15:25:57 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	George Spelvin <linux@...izon.com>, linux-kernel@...r.kernel.org,
	mingo@...nel.org, price@....edu
Subject: Re: drivers/char/random.c: More futzing about

On Wed, Jun 11, 2014 at 09:48:31AM -0700, H. Peter Anvin wrote:
> While talking about performance, I did a quick prototype of random using
> Skein instead of SHA-1, and it was measurably faster, in part because
> Skein produces more output per hash.

Which Skein parameters did you use, and how much stack space was
required for it?  Skein-512 is described as needing 200 bytes of
state, IIRC (which I assume most of which comes from Threefish key
schedule). 

						- Ted
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