linux-kernel - Re: [PATCH] Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE

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Message-ID: <20080516121239.GA9627@gondor.apana.org.au>
Date:	Fri, 16 May 2008 20:12:39 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, Jeff Garzik <jeff@...zik.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Chris Peterson <cpeterso@...terso.com>,
	tpmdd-devel@...ts.sourceforge.net, tpm@...horst.net
Subject: Re: [PATCH] Re: [PATCH] drivers/net: remove network drivers' last few uses of IRQF_SAMPLE_RANDOM

On Fri, May 16, 2008 at 12:19:49PM +0200, Andi Kleen wrote:
>
> Just think a little bit: system has no randomness source except the
> hardware RNG. you do your strange randomness verification. if it fails
> what do you do? You don't feed anything into your entropy pool and all
> your  random output is predictable (just boot time)  If you add anything
> predictable from another source it's still predictable, no difference.

You can continue to feed data into the pool even if it fails the
test.  You just keep the entropy value same as before.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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