Bug#649211: linux-image-486: /sys/devices/system/cpu/cpu0/crash_notes and no topology
Package: linux-image-486
Version: 3.1.1
Severity: important
Hi,
I have tested virt-manager on my Debian Squeeze on several installations.
Unfortunatly it does not work with 486 variant of the kernel [1]. When running
the 686 variant, the topology is found in /sys/devices/system/cpu/cpu0/ , but
not with 486 [2].
In some situtuations the user is not able or does not want to use the 686-pae
version (e.g. my lovely testing platform X40 has no PAE capable processor and
in VirtualBox the performance suffers when activating PAE and one does usually
not need PAE for 32bit testing vms).
I have found and old bugreport, which describes a similar problem.
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.17/+bug/66812
When crawling the net, most of this errors were solved by choosing the 686
variant of the kernel, which is not available anymore (not beyond Squeeze). The
Squeeze kernel does not have cgroup_memory built in, which prevents virt-
manager from working with LXC.
The 486 kernel from wheezy and sid (3.0.0 and 3.1.1) didn't boot proper on my
X40, but in VirtualBox, I was able to verify, that these versions still don't
show cputopology in /sys/devices/system.
Regards,
Marcus
[1]
Error polling connection 'qemu:///system': cannot open
/sys/devices/system/cpu/cpu0/topology/physical_package_id: No such file or
directory
Error polling connection 'lxc:///': cannot open
/sys/devices/system/cpu/cpu0/topology/physical_package_id: No such file or
directory
[2]
root@thinkpad:/home/ossy# ls -l /sys/devices/system/cpu/cpu0/
insgesamt 0
drwxr-xr-x 3 root root 0 18. Nov 21:34 cpufreq
drwxr-xr-x 7 root root 0 18. Nov 21:34 cpuidle
-r-------- 1 root root 4096 18. Nov 21:38 crash_notes
root@thinkpad:/home/ossy# cat /sys/devices/system/cpu/cpu0/crash_notes
377f1e5c
-- System Information:
Debian Release: 6.0.3
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.39-bpo.2-486
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
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