linux-kernel - Re: 2.6.25-rc1 xen pvops regression

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]

Date:	Wed, 20 Feb 2008 22:30:24 +0000
From:	Ian Campbell <ijc@...lion.org.uk>
To:	Joel Becker <Joel.Becker@...cle.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jody Belka <lists-lkml@...b.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <andi@...stfloor.org>,
	Mika Penttila <mika.penttila@...umbus.fi>
Subject: Re: 2.6.25-rc1 xen pvops regression

On Wed, 2008-02-20 at 13:42 -0800, Joel Becker wrote:
> 	What changed to make this not work in the first place?  New dmi
> code?

I don't think so -- this code is present even in the 2.6.18-xen.hg tree
(where it's gated with is_initial_domain() which isn't suitable for the
upstream tree).

I don't really know why it should start happening now. It may be that
some of the recentish changes to e.g. early_ioremap or early pagetable
setup etc. have tweaked the layout of the early pagetables around so
this problem bites us more readily. Or it may just be a combination of
kernel image size, RAM size and perhaps a dose of bad luck.

Ian.
-- 
Ian Campbell

... at least I thought I was dancing, 'til somebody stepped on my hand.
		-- J. B. White

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/