Re: [Xen-users] BUG? domU reboot fails when using "pci =" option

[Ryan <hap9@xxxxxxxxxxxxxx>]

On Fri, 2006-05-05 at 11:08 -0700, list user wrote:
> Sorry for the delay in replying.  Life intervened ;)
> 
> The tail-end of the xend.log is attached.  I've included a successful 
> shutdown (#16), successfull startup (#17), failed restart (#18).
> 
> > 
> [2006-05-04 18:39:49 xend.XendDomainInfo] DEBUG (XendDomainInfo:284) 
> parseConfig: config is ['vm', ['name', 'vm1'], ['memory', 64], ['vcpus', 1], 
> ['image', ['linux', ['kernel', '/boot/vmlinuz-2.6.16-xen'], ['ramdisk', 
> '/boot/initrd-2.6.16-xen.img'], ['root', '/dev/hda1 ro'], ['args', 
> 'netloop.nloopbacks=0 4']]], ['device', ['vbd', ['uname', 'phy:vg0/vm1'], 
> ['dev', 'hda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 
> 'phy:vg0/usr'], ['dev', 'hda2'], ['mode', 'r']]], ['device', ['vbd', 
> ['uname', 'phy:vg0/sw1'], ['dev', 'hda3'], ['mode', 'w']]], ['device', 
> ['pci', ['dev', ['domain', '0x0'], ['bus', '0x00'], ['slot', '0x0d'], 
> ['func', '0x0']]]], ['device', ['vif', ['bridge', 'LAN'], ['mac', 
> '00:16:3e:11:11:01']]], ['device', ['vif', ['bridge', 'DMZ'], ['mac', 
> '00:16:3e:22:22:01']]]]
> [2006-05-04 18:39:49 xend.XendDomainInfo] DEBUG (XendDomainInfo:380) 
> parseConfig: result is {'ssidref': None, 'uuid': None, 'on_crash': None, 
> 'on_reboot': None, 'image': ['linux', ['kernel', '/boot/vmlinuz-2.6.16-xen'], 
> ['ramdisk', '/boot/initrd-2.6.16-xen.img'], ['root', '/dev/hda1 ro'], 
> ['args', 'netloop.nloopbacks=0 4']], 'on_poweroff': None, 'cpus': None, 
> 'name': 'vm1', 'backend': [], 'vcpus': 1, 'cpu_weight': None, 'vcpu_avail': 
> None, 'memory': 64, 'device': [('vbd', ['vbd', ['uname', 'phy:vg0/vm1'], 
> ['dev', 'hda1'], ['mode', 'w']]), ('vbd', ['vbd', ['uname', 'phy:vg0/usr'], 
> ['dev', 'hda2'], ['mode', 'r']]), ('vbd', ['vbd', ['uname', 'phy:vg0/sw1'], 
> ['dev', 'hda3'], ['mode', 'w']]), ('pci', ['pci', ['dev', ['domain', '0x0'], 
> ['bus', '0x00'], ['slot', '0x0d'], ['func', '0x0']]]), ('vif', ['vif', 
> ['bridge', 'LAN'], ['mac', '00:16:3e:11:11:01']]), ('vif', ['vif', ['bridge', 
> 'DMZ'], ['mac', '00:16:3e:22:22:01']])], 'bootloader': None, 'cpu': None, 
> 'maxmem': None}
<snip>
> [2006-05-05 09:23:55 xend.XendDomainInfo] DEBUG (XendDomainInfo:178) 
> XendDomainInfo.create(['domain', ['domid', 17], ['uuid', 
> '18a8461c-3a63-6155-797a-b66ba7e271e7'], ['ssidref', 0], ['vcpus', 1], 
> ['vcpu_avail', 1], ['cpu_weight', 1.0], ['memory', 64], ['maxmem', 64], 
> ['name', 'vm1'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], 
> ['on_crash', 'restart'], ['image', ['linux', ['kernel', 
> '/boot/vmlinuz-2.6.16-xen'], ['ramdisk', '/boot/initrd-2.6.16-xen.img'], 
> ['root', '/dev/hda1 ro'], ['args', 'netloop.nloopbacks=0 4']]], ['device', 
> ['vif', ['backend', 0], ['script', 'my-vif-bridge'], ['bridge', 'LAN'], 
> ['mac', '00:16:3e:11:11:01']]], ['device', ['vif', ['backend', 0], ['script', 
> 'my-vif-bridge'], ['bridge', 'DMZ'], ['mac', '00:16:3e:22:22:01']]], 
> ['device', ['vbd', ['backend', 0], ['dev', 'hda1'], ['uname', 'phy:vg0/vm1'], 
> ['mode', 'w']]], ['device', ['vbd', ['backend', 0], ['dev', 'hda2'], 
> ['uname', 'phy:vg0/usr'], ['mode', 'r']]], ['device', ['vbd', ['backend', 0], 
> ['dev', 'hda3'], ['uname', 'phy:vg0/sw1'], ['mode', 'w']]], ['device', 
> ['pci', ['backend', 0]]], ['state', '---s--'], ['shutdown_reason', 'reboot'], 
> ['cpu_time', 360.46612260400002], ['online_vcpus', 1], ['up_time', 
> '53045.8447151'], ['start_time', '1146793189.71'], ['store_mfn', 57181], 
> ['console_mfn', 57180]])
> [2006-05-05 09:23:55 xend.XendDomainInfo] DEBUG (XendDomainInfo:284) 
> parseConfig: config is ['domain', ['domid', 17], ['uuid', 
> '18a8461c-3a63-6155-797a-b66ba7e271e7'], ['ssidref', 0], ['vcpus', 1], 
> ['vcpu_avail', 1], ['cpu_weight', 1.0], ['memory', 64], ['maxmem', 64], 
> ['name', 'vm1'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], 
> ['on_crash', 'restart'], ['image', ['linux', ['kernel', 
> '/boot/vmlinuz-2.6.16-xen'], ['ramdisk', '/boot/initrd-2.6.16-xen.img'], 
> ['root', '/dev/hda1 ro'], ['args', 'netloop.nloopbacks=0 4']]], ['device', 
> ['vif', ['backend', 0], ['script', 'my-vif-bridge'], ['bridge', 'LAN'], 
> ['mac', '00:16:3e:11:11:01']]], ['device', ['vif', ['backend', 0], ['script', 
> 'my-vif-bridge'], ['bridge', 'DMZ'], ['mac', '00:16:3e:22:22:01']]], 
> ['device', ['vbd', ['backend', 0], ['dev', 'hda1'], ['uname', 'phy:vg0/vm1'], 
> ['mode', 'w']]], ['device', ['vbd', ['backend', 0], ['dev', 'hda2'], 
> ['uname', 'phy:vg0/usr'], ['mode', 'r']]], ['device', ['vbd', ['backend', 0], 
> ['dev', 'hda3'], ['uname', 'phy:vg0/sw1'], ['mode', 'w']]], ['device', 
> ['pci', ['backend', 0]]], ['state', '---s--'], ['shutdown_reason', 'reboot'], 
> ['cpu_time', 360.46612260400002], ['online_vcpus', 1], ['up_time', 
> '53045.8447151'], ['start_time', '1146793189.71'], ['store_mfn', 57181], 
> ['console_mfn', 57180]]
> [2006-05-05 09:23:55 xend.XendDomainInfo] DEBUG (XendDomainInfo:380) 
> parseConfig: result is {'ssidref': 0, 'uuid': 
> '18a8461c-3a63-6155-797a-b66ba7e271e7', 'on_crash': 'restart', 'on_reboot': 
> 'restart', 'image': ['linux', ['kernel', '/boot/vmlinuz-2.6.16-xen'], 
> ['ramdisk', '/boot/initrd-2.6.16-xen.img'], ['root', '/dev/hda1 ro'], 
> ['args', 'netloop.nloopbacks=0 4']], 'on_poweroff': 'destroy', 'cpus': None, 
> 'name': 'vm1', 'backend': [], 'vcpus': 1, 'cpu_weight': 1.0, 'vcpu_avail': 1, 
> 'memory': 64, 'device': [('vif', ['vif', ['backend', 0], ['script', 
> 'my-vif-bridge'], ['bridge', 'LAN'], ['mac', '00:16:3e:11:11:01']]), ('vif', 
> ['vif', ['backend', 0], ['script', 'my-vif-bridge'], ['bridge', 'DMZ'], 
> ['mac', '00:16:3e:22:22:01']]), ('vbd', ['vbd', ['backend', 0], ['dev', 
> 'hda1'], ['uname', 'phy:vg0/vm1'], ['mode', 'w']]), ('vbd', ['vbd', 
> ['backend', 0], ['dev', 'hda2'], ['uname', 'phy:vg0/usr'], ['mode', 'r']]), 
> ('vbd', ['vbd', ['backend', 0], ['dev', 'hda3'], ['uname', 'phy:vg0/sw1'], 
> ['mode', 'w']]), ('pci', ['pci', ['backend', 0]])], 'bootloader': None, 
> 'cpu': None, 'maxmem': 64}

I see the problem here. When you create domain 17, the pci config passed
to xend is correct:
['device', ['pci', ['dev', ['domain', '0x0'], ['bus', '0x00'], ['slot',
'0x0d'], ['func', '0x0']]]]

but when it reboots to create 18, the pci config is not passed in
correctly:
['device', ['pci', ['backend', 0]]]

Apparently there's a function missing (DevController::configuration) in
tools/python/xen/xend/server/pciif.py that rebuilds the configuration
for situations like reboot. If time allows, I'll add the function and
submit it, but if you or someone else needs it now, it should be pretty
trivial to write.

Ryan


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