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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20080526175227.4b7ae764.billfink@mindspring.com>
Date:	Mon, 26 May 2008 17:52:27 -0400
From:	Bill Fink <billfink@...dspring.com>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Alejandro Riveira Fernández 
	<ariveira@...il.com>, Theodore Tso <tytso@....EDU>,
	Glen Turner <gdt@....id.au>,
	Chris Peterson <cpeterso@...terso.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Jeff Garzik <jeff@...zik.org>,
	"Kok\, Auke" <auke-jan.h.kok@...el.com>,
	Rick Jones <rick.jones2@...com>,
	"Brandeburg\, Jesse" <jesse.brandeburg@...el.com>,
	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 Mon, 26 May 2008, Krzysztof Halasa wrote:

> Bill Fink <billfink@...dspring.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
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html