From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vincent Caron Subject: Bug#603632: PVops domain 0 crash on NUMA system only Node==1 present (Was: Re: Bug#603632: linux-image-2.6.32-5-xen-amd64: Linux kernel 2.6.32/xen/amd64 booting fine on bare metal, but not as dom0 with Xen 4.0.1 (Dell R410)) Date: Thu, 25 Nov 2010 14:29:46 +0100 Message-ID: <1290691786.14372.505.camel@zerohal> References: <20101115233253.11935.35707.reportbug@zerohal> <1290513067.31507.7699.camel@zakaz.uk.xensource.com> Reply-To: Vincent Caron , 603632@bugs.debian.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Return-path: Resent-To: debian-bugs-dist@lists.debian.org Resent-Message-ID: In-Reply-To: <1290513067.31507.7699.camel@zakaz.uk.xensource.com> List-Post: List-Help: List-Subscribe: List-Unsubscribe: To: Ian Campbell Cc: Vincent CARON , 603632@bugs.debian.org, Cris Daniluk , xen-devel , Jeremy Fitzhardinge , Keir Fraser List-Id: xen-devel@lists.xenproject.org On Tue, 2010-11-23 at 11:51 +0000, Ian Campbell wrote: > > One thing I notice when googling R410 issues is that they apparently > have a "Cores per CPU" BIOS option which might be worth playing with, > since configuring a reduced number of cores might remove node 0 but not > node 1 (odd but not invalid?). Presumably it is also worth making sure > you have the latest BIOS etc. Indeed, I tweaked one BIOS setting, I disabled hyperthreading. The R410 BIOS has a CPU menu with (among other options): - Logical Processor: this is 'HT', default is enabled, I have disabled it. - Virtualization Technology: default is disabled. Kept disabled. - Number of Cores per Processor: default is 'All'. Options are single/dual/all. Kept 'all' defalut. I just tried to boot Xen 4.0 hypervisor after reverting to the factory default 'HT enabled' (aka Logical Processor: Yes), same bug. Then I swithed off HT again, and enabled 'Virtualization Technology' (setting which I totally overlooked, but why is it disabled as default ?). Same bug. > It's very much an outside possibility but it is also worth trying the > packages at http://xenbits.xen.org/people/ianc/ which reinstates the > changesets from bcf16b6b4f34fb40a7aaf637947c7d3bce0be671 OK, should I pick the one in http://xenbits.xen.org/people/ianc/squeeze/ ? (I'm running Debian Squeeze on this machine)