[Xen-devel] Unable to create guest domain AND mm.c/grant_table.c errors

["Bonnell, David" <David_Bonnell@xxxxxxx>]

Since a few changesets back (currently using 6963) I am unable to create a guest domain.  It appears the front-end VBD cannot connect to the backend and as such the guest cannot mount its root filesystem and panics.

 

The xen console log and xend logs are attached.  Below is the bottom part of the guest’s console output

 

…

Event-channel device ubstakked,

xen_blk: Initialising virtual block device driver

*** A FEW SECONDS DELAY ***

xen_blk: Timeout connecting to device!

xen_net: Initialising virtual Ethernet driver.

NET: Registered protocol family 2

…

Root-NFS: No NFS server available, giving up.

VFS: Unable to mount root fs via NFS, trying floppy.

VFS: Cannot open root device “sda1” or unknown-block(2,0)

Please append a correct “root=” boot option

Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(2,0)

 

The “Unable to read memory/target” console message at the end of the Xen console log is new for this changeset.  Also, every now and then a failed attempt to create a guest domain ends with the following sequence of errors on the Xen console and after such a failure the guest domain is not automatically destroyed as it is normally and needs a manual “xm destroy ???” command to remove it.

 

(XEN) DOM0: (file=mm.c, line=2458) Could not find PTE entry for address c8cec000

(XEN) DOM0: (file=mm.c, line=2458) Could not find PTE entry for address c8ced000

(XEN) (file=grant_table.c, line=1054) Grant unref rd(7) ld(0) frm(1ff51) flgs(0).

(XEN) (file=grant_table.c, line=1054) Grant unref rd(7) ld(0) frm(1ff50) flgs(0).

 

 

-Dave

xend.log
Description: xend.log

xen.log
Description: xen.log

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