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Re: [Xen-devel] trying to debug xen4 & qemu-dm, Xen reports "core dump

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] trying to debug xen4 & qemu-dm, Xen reports "core dump failed"
From: 0bo0 <0.bugs.only.0@xxxxxxxxx>
Date: 2010年1月27日 08:20:41 -0800
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Wed, Jan 27, 2010 at 7:46 AM, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:
> Hm, well, can you try stripping your config file right back (but still
> specifying vfb=['']) -- like removing all vbds for example? Obviously your
> guest will not successfully boot, but qemu-dm crashing is no doubt
> preventing your guest from even starting in the first place. So you can
> strip back and see whether at any point behaviour changes from 'qemu-dm
> crashes' to 'guest partially boots but then fails to find a rootfs'.
i've been stripping back as suggested, and trying different config
option combos. nothing seems to make any difference to ability to
launch, so far, except removal of 'vfb=['']' :-/
i've switched to booting from a different local vmlinuz & initrd,
instead of either the domUbootloader.py or the distro release -xen
imgs, and have noticed one change in logs:
...
[2010年01月27日 08:16:51 2217] WARNING (XendDomainInfo:2072) Domain has
crashed: name=nas id=30.
[2010年01月27日 08:16:51 2217] DEBUG (XendDomainInfo:3061)
XendDomainInfo.destroy: domid=30
[2010年01月27日 08:16:52 2217] DEBUG (pciif:460)
XendDomainInfo.handleAerStateWatch
[2010年01月27日 08:16:52 2217] DEBUG (XendDomainInfo:1892)
XendDomainInfo.handleShutdownWatch
[2010年01月27日 08:16:52 2217] DEBUG (XendDomainInfo:2416) Destroying
device model
[2010年01月27日 08:16:53 2217] DEBUG (XendDomainInfo:2423) Releasing
devices
[2010年01月27日 08:16:53 2217] DEBUG (XendDomainInfo:2429) Removing vif/0
[2010年01月27日 08:16:53 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:2429) Removing vif/1
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/1
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:2429) Removing vif/2
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/2
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:2429) Removing vif/3
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/3
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:2429) Removing vkbd/0
[2010年01月27日 08:16:54 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vkbd, device = vkbd/0
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:2429) Removing
vbd/51712
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51712
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:2429) Removing
vbd/51728
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51728
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:2429) Removing
vbd/51744
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51744
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:2429) Removing vfb/0
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = vfb, device = vfb/0
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:2429) Removing pci/0
[2010年01月27日 08:16:55 2217] DEBUG (XendDomainInfo:1271)
XendDomainInfo.destroyDevice: deviceClass = pci, device = pci/0
[2010年01月27日 08:16:55 2217] DEBUG (pciif:578) pci: unregister aer watch
[2010年01月27日 08:16:55 2217] ERROR (XendConfig:1175) dumping sxp from
device controllers
Traceback (most recent call last):
 File "/usr/lib64/python2.6/site-packages/xen/xend/XendConfig.py",
line 1161, in to_sxp
 configs = controller.configurations(txn)
 File "/usr/lib64/python2.6/site-packages/xen/xend/server/DevController.py",
line 242, in configurations
 return map(lambda x: self.configuration(x, transaction),
self.deviceIDs(transaction))
 File "/usr/lib64/python2.6/site-packages/xen/xend/server/DevController.py",
line 242, in <lambda>
 return map(lambda x: self.configuration(x, transaction),
self.deviceIDs(transaction))
 File "/usr/lib64/python2.6/site-packages/xen/xend/server/DevController.py",
line 249, in configuration
 configDict = self.getDeviceConfiguration(devid, transaction)
 File "/usr/lib64/python2.6/site-packages/xen/xend/server/netif.py",
line 194, in getDeviceConfiguration
 y = self.readBackendTxn(transaction, devid, x)
 File "/usr/lib64/python2.6/site-packages/xen/xend/server/DevController.py",
line 447, in readBackendTxn
 raise VmError("Device %s not connected" % devid)
VmError: Device 2 not connected
the
[2010年01月27日 08:16:55 2217] ERROR (XendConfig:1175) dumping sxp from
device controllers
Traceback (most recent call last):
...
are not there in other circumstances ...
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