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Date: Mon, 26 May 2008 17:52:27 -0400
From: Bill Fink <billfink@mindspring.com>
To: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Alejandro Riveira =?ISO-8859-1?Q?Fern=E1ndez?= 
	<ariveira@gmail.com>,
       Theodore Tso <tytso@MIT.EDU>, Glen Turner <gdt@gdt.id.au>,
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       Rick Jones <rick.jones2@hp.com>,
       "Brandeburg\, Jesse" <jesse.brandeburg@intel.com>,
       netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drivers/net: remove network drivers' last few uses of
 IRQF_SAMPLE_RANDOM
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On Mon, 26 May 2008, Krzysztof Halasa wrote:

> Bill Fink <billfink@mindspring.com> writes:
> 
> > Another idea that occured to me:  How about using the low order bits
> > of the instruction memory address being executed that was interrupted
> > by the HZ timer interrupt.
> 
> Think of constant-instructions-length processors :-)

I'm not sure what you're driving at, but if it's that you shouldn't
use the very last 2 or 3 bits, then sure those should be excluded.
But that still leaves 9 or 10 bits at least in the page offset, and
that's being conservative in the number of address bits to sample.

						-Bill