[CentOS-virt] Frequent Kernel Oops' on CentOS 6 / Xen

Wed Jul 30 14:09:00 UTC 2014
George Dunlap <dunlapg at umich.edu>

On Tue, Jul 29, 2014 at 3:44 PM, Daniel Bradler <daniel at bradler.com> wrote:
> Hi,
>
> we have a couple of nodes based on CentOS 6 and Xen4CentOS. Unfortunately
> some of these nodes keep crashing frequenly.
>
> We use the latest versions:
>
> # uname -r
> 3.10.43-11.el6.centos.alt.x86_64
>
> # xm info
> host                   : vserver20
> release                : 3.10.43-11.el6.centos.alt.x86_64
> version                : #1 SMP Mon Jun 16 14:22:02 UTC 2014
> machine                : x86_64
> nr_cpus                : 24
> nr_nodes               : 2
> cores_per_socket       : 6
> threads_per_core       : 2
> cpu_mhz                : 2400
> hw_caps                :
> bfebfbff:2c100800:00000000:00003f40:009ee3fd:00000000:00000001:00000000
> virt_caps              : hvm hvm_directio
> total_memory           : 65527
> free_memory            : 22692
> free_cpus              : 0
> xen_major              : 4
> xen_minor              : 2
> xen_extra              : .4-33.el6
> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
> hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler          : credit
> xen_pagesize           : 4096
> platform_params        : virt_start=0xffff800000000000
> xen_changeset          : unavailable
> xen_commandline        : dom0_mem=2560M,max:3072M loglvl=all
> guest_loglvl=all
> cc_compiler            : gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
> cc_compile_by          : mockbuild
> cc_compile_domain      : centos.org
> cc_compile_date        : Mon Jun 16 17:22:14 UTC 2014
> xend_config_format     : 4
>
> Our configuration looks as follows:
>
> Grub:
>
> title CentOS (3.10.43-11.el6.centos.alt.x86_64)
>         root (hd0,1)
>         kernel /xen.gz dom0_mem=2560M,max:3072M loglvl=all guest_loglvl=all
>         module /vmlinuz-3.10.43-11.el6.centos.alt.x86_64 ro root=/dev/sda1
> KEYBOARDTYPE=pc KEYTABLE=de-latin1-nodeadkeys crashkernel=auto
>         module /initramfs-3.10.43-11.el6.centos.alt.x86_64.img
>
> /etc/xen/xend-config.sxp
>
> (xend-unix-server yes)
> (xend-relocation-server no)
> (xend-relocation-hosts-allow '^localhost$ ^localhost\\.localdomain$')
> (network-script network-bridge)
> (vif-script vif-bridge)
> (dom0-min-mem 1024)
> (enable-dom0-ballooning no)
> (total_available_memory 0)
> (dom0-cpus 0)
> (vncpasswd '')
>
> I've attached the logfile information regarding the latest crash as
> crash.log?

Thanks for this report -- would it be possible to get a full console
log from boot?

 -George