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

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Message-ID: <482CB1FB.7080807@garzik.org>
Date:	Thu, 15 May 2008 17:58:19 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Theodore Tso <tytso@....edu>,
	Chris Peterson <cpeterso@...terso.com>,
	"Kok, Auke" <auke-jan.h.kok@...el.com>,
	Rick Jones <rick.jones2@...com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/net: remove network drivers' last few uses of
 IRQF_SAMPLE_RANDOM

Theodore Tso wrote:
> On Thu, May 15, 2008 at 01:01:36PM -0700, Chris Peterson wrote:
>> Please correct me if I'm wrong, but this thread's conclusions seem to be:
>>
>> * network interrupts are an inappropriate source of entropy (see my patch)
>> * headless servers need entropy, but should seek a better solution,
>> such as EGD, hardware RNG, or other kernel entropy sources (but that
>> is a separate task)
>> * TPM RNG is a separate task and, if implemented, should be in
>> drivers/char/hw_random/
> 
> The TPM RNG task is probably best done in a user space process, which
> might also do other things like pulling environmental noise from the
> sound card's microphone, etc.
> 
> The problem is finding someone with the skills, time, and energy to
> create the appropriate user space daemon.  All of the kernel
> interfaces already exist; it's just matter of implementing the user
> space support.

rngd is already deployed in most distros, via rng-tools.  Motivated 
people are welcome to steal maintainership from me...

	Jeff


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