[CentOS-virt] xen-c6 fails to boot

Mon Dec 1 10:48:17 UTC 2014
Bob Ball <bob.ball at citrix.com>

Hi all,

Following instructions at http://wiki.centos.org/QaWiki/Xen4 to setup Xen on CentOS 6.4.  Unfortunately after installing Xen and modifying the boot line there is a kernel panic during the boot process causing the host to enter a reboot loop.  Console log attached.

 [<ffffffff81575480>] panic+0xc4/0x1e1
 [<ffffffff81054836>] find_new_reaper+0x176/0x180
 [<ffffffff81055345>] forget_original_parent+0x45/0x2c0
 [<ffffffff81107214>] ? task_function_call+0x44/0x50
 [<ffffffff810555d7>] exit_notify+0x17/0x140
 [<ffffffff81057053>] do_exit+0x1f3/0x450
 [<ffffffff81057305>] do_group_exit+0x55/0xd0
 [<ffffffff81057397>] sys_exit_group+0x17/0x20
 [<ffffffff815806a9>] system_call_fastpath+0x16/0x1b


title xen
        root (hd0,0)
        kernel /xen.gz dom0_mem=256M,max:256M loglvl=all guest_loglvl=all
        module /vmlinuz-3.4.53-8.el6.centos.alt.x86_64 ro root=/dev/mapper/vg_cs-lv_root rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=uk LANG=en_US.UTF-8 rd_LVM_LV=vg_cs/lv_root rd_Np
        module /initramfs-3.4.53-8.el6.centos.alt.x86_64.img

This issue was found in an automated environment that actually uses Dave Scott's Xen 4.4 branch (http://xenbits.xen.org/djs/centos-xen-4-4/) however in trying to diagnose the issue we found that the base xen-c6 combination failed in the same way.  Note also that the last successful run (which was a while ago due to a configuration issue) used the same xen and kernel as the now-failing environments.
Both the failing and passing environments are using xen-4.4.0-2.el6.x86_64 and kernel-3.4.53-8.el6.centos.alt.x86_64.

Is the current combination of xen/kernel in xen-c6 working for others at the moment?
Are there any thoughts on what might be causing this regression?

-------------- next part --------------
A non-text attachment was scrubbed...
Name: console.log
Type: application/octet-stream
Size: 11153 bytes
Desc: console.log
URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20141201/3a42fcb3/attachment-0002.obj>