linux-kernel - Re: [patch 134/149] x86, paravirt: Add a global synchronization point for pvclock

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, 7 Jul 2010 16:33:39 +0200
From:	Peter Palfrader <peter@...frader.org>
To:	Glauber Costa <glommer@...hat.com>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	stable@...nel.org, stable-review@...nel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Zachary Amsden <zamsden@...hat.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [patch 134/149] x86, paravirt: Add a global synchronization
	point for pvclock

On Wed, 07 Jul 2010, Glauber Costa wrote:

> > 2.6.32.16 fails to boot on my KVM domains using qemu-kvm 0.11.1.
> > 
> > Bisecting between 2.6.32.14 which worked and .16 turned up this commit
> > as the first culprit[0].
> > 
> > The host is still running 2.6.32.14 and has 8 cores on 2 CPUs.  The
> > single-cpu KVM domain hangs just after printing 'Write protecting the
> > kernel read-only data: 9492k'[1].   On a successful boot this line would
> > usually be followed by 'INIT: version 2.86 booting'.
> > 
> > A 2.6.32.16 with this patch reverted boots fine.
> > 
> > If there's any info you need please just ask.

> if you boot with another clocksource, and then switch to kvmclock with the machine already
> running, do you see anything strange or suspicious?

Booting with various clocksource=xxx kernel parameters does not change
the behaviour at all, i.e. the boot still hangs.

Cheers,
Peter
-- 
                           |  .''`.  ** Debian GNU/Linux **
      Peter Palfrader      | : :' :      The  universal
 http://www.palfrader.org/ | `. `'      Operating System
                           |   `-    http://www.debian.org/
--
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/