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

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Message-ID: <20080517010136.GA15102@gondor.apana.org.au>
Date:	Sat, 17 May 2008 09:01:36 +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 06:25:12PM +0200, Andi Kleen wrote:
>
> You could do that, but what advantage would it have? I don't think it's
> worth running the FIPS test, or rather requiring the user land daemon
> and leaving behind most of the userbase just for this.

The obvious advantage is that you don't unblock /dev/random readers
until there is real entropy available.

Remember that a hardware RNG failure is a catastrophic event, so
a heavy-handed response such as blocking /dev/random is reasonable.

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