Pkg xen devel - Nov 2009 - Bug#557098: xen-hypervisor-3.2-1-amd64: Using vcpus=2 causes the guest to hang after some time

Package: xen-hypervisor-3.2-1-amd64
Version: 3.2.1-2
Severity: normal

I have a dual-core host. I wanted to give one of my guests use of 2 vcpus and
use of both real cpus.

I had the following in my config file for the guest:

vcpus = 2
cpus = 0,1

This appeared to work correctly and I saw a big difference in the load average
(the guest is monitored by munin-node).

However after 12 hours or so, the guest simply stopped responding and froze. I
saw nothing obvious in the sar system activity report, the xend log, the guest
logs, guest syslog etc. It just froze at a localtime between 0647 and 0650 (if
thats significant?).

A quick Google found a few reports of the same issue but I did not go into more
details. I reverted to the default of vcpu=1 and no trouble has been had.



-- System Information:
Debian Release: 5.0.3
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-2-xen-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB, LC_CTYPE=en_GB (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

xen-hypervisor-3.2-1-amd64 depends on no packages.

Versions of packages xen-hypervisor-3.2-1-amd64 recommends:
ii  xen-utils-3.2-1               3.2.1-2    XEN administrative tools

Versions of packages xen-hypervisor-3.2-1-amd64 suggests:
pn  xen-docs-3.2                  <none>     (no description available)

-- no debconf information

Your message dated Mon, 1 Mar 2010 22:36:37 +0100
with message-id <20100301213637.GC4974 at wavehammer.waldi.eu.org>
and subject line Re: [Pkg-xen-devel] Bug#557098: xen-hypervisor-3.2-1-amd64:
Using vcpus=2 causes the guest to hang after some time
has caused the Debian Bug report #557098,
regarding xen-hypervisor-3.2-1-amd64: Using vcpus=2 causes the guest to hang
after some time
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner at bugs.debian.org
immediately.)


-- 
557098: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=557098
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems
-------------- next part --------------
An embedded message was scrubbed...
From: Imran Chaudhry <imran at smoothwall.net>
Subject: xen-hypervisor-3.2-1-amd64: Using vcpus=2 causes the guest to hang
after
 some time
Date: Thu, 19 Nov 2009 14:25:52 +0000
Size: 3053
URL:
<http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20100301/d952573a/attachment.eml>
-------------- next part --------------
An embedded message was scrubbed...
From: Bastian Blank <waldi at debian.org>
Subject: Re: [Pkg-xen-devel] Bug#557098: xen-hypervisor-3.2-1-amd64: Using
	vcpus=2 causes the guest to hang after some time
Date: Mon, 1 Mar 2010 22:36:37 +0100
Size: 1820
URL:
<http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20100301/d952573a/attachment-0001.eml>