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

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Message-ID: <20080515214721.GP18825@mit.edu>
Date:	Thu, 15 May 2008 17:47:21 -0400
From:	Theodore Tso <tytso@....edu>
To:	Chris Peterson <cpeterso@...terso.com>
Cc:	Jeff Garzik <jeff@...zik.org>,
	"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

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.

						- Ted
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