[Xen-users] Cannot use USB storage device as DomU drive

[David Cundiff <dcundiff@xxxxxxxxx>]

I just upgraded a perfectly stable xen-2.0.6 system to the 
xen-3.0-testing, changeset 8269:a91e4dcf629d I believe. My system uses 
LVM's for most of the DomU drives and I have 1 USB drive that I mount 
into a DomU. After the upgrade I can no longer get my USB drive to 
mount. In the DomU I get "VFS: Cannot open root device "sda1" or 
unknown-block(2,0)". This also leaves a zombie behind. Nothing 
interesting in any of the xendlogs other than telling me the domain 
crashed. I did get this kernel message from Dom0 right after the network 
interface is brought up
Jan 15 14:37:48 localhost kernel: Modules linked in: ipt_physdev 
iptable_filter ip_tables
Jan 15 14:37:48 localhost kernel: CPU:    0
Jan 15 14:37:48 localhost kernel: EIP:    0061:[blkdev_put+13/288]    
Not tainted VLI
Jan 15 14:37:48 localhost kernel: EFLAGS: 00010282   (2.6.12.6-xen0)
Jan 15 14:37:48 localhost kernel: EIP is at blkdev_put+0xd/0x120
Jan 15 14:37:48 localhost kernel: eax: fffffffa   ebx: fffffffa   ecx: 
0000002e   edx: ffffffff
Jan 15 14:37:48 localhost kernel: esi: c0bd9d08   edi: f2ebbd1c   ebp: 
00000000   esp: c07c7f10
Jan 15 14:37:48 localhost kernel: ds: 007b   es: 007b   ss: 0069
Jan 15 14:37:48 localhost kernel: Process events/0 (pid: 3, 
threadinfo=c07c6000 task=c0bcf020)
Jan 15 14:37:48 localhost kernel: Stack: 00000000 00000000 f2ebbcfc 
c0bd9d08 f2ebbd1c c0bd9d00 c02dbc09 fffffffa
Jan 15 14:37:48 localhost kernel:        f2ebbcd8 c02dba3d f2ebbcfc 
f2ebbcd8 00000000 c012c58a f2ebbcd8 c07c7f6c
Jan 15 14:37:48 localhost kernel:        00000000 00000246 f2ebbcd8 
c02dba20 c07c6000 ffffffff ffffffff 00000001
Jan 15 14:37:48 localhost kernel: Call Trace:
Jan 15 14:37:48 localhost kernel:  [vbd_free+41/48] vbd_free+0x29/0x30
Jan 15 14:37:48 localhost kernel:  [free_blkif+29/128] free_blkif+0x1d/0x80
Jan 15 14:37:48 localhost kernel:  [worker_thread+426/656] 
worker_thread+0x1aa/0x290
Jan 15 14:37:48 localhost kernel:  [free_blkif+0/128] free_blkif+0x0/0x80
Jan 15 14:37:48 localhost kernel:  [default_wake_function+0/32] 
default_wake_function+0x0/0x20
Jan 15 14:37:48 localhost kernel:  [default_wake_function+0/32] 
default_wake_function+0x0/0x20
Jan 15 14:37:48 localhost kernel:  [worker_thread+0/656] 
worker_thread+0x0/0x290
Jan 15 14:37:48 localhost kernel:  [kthread+170/176] kthread+0xaa/0xb0
Jan 15 14:37:48 localhost kernel:  [kthread+0/176] kthread+0x0/0xb0
Jan 15 14:37:48 localhost kernel:  [kernel_thread_helper+5/16] 
kernel_thread_helper+0x5/0x10
Jan 15 14:37:48 localhost kernel: Code: 24 04 89 3c 24 e8 04 fa ff ff 89 
c3 31 c0 85 db 74 dc 89 3c 24 e8 04 00 00 00 89 d8 eb d0 55 31 ed 57 56 
53 83 ec 08 8
b 5c 24 1c <8b> 73 04 8b 7b 50 ff 4b 0c 0f 88 57 04 00 00 8b 43 08 48 85 c0


Any ideas??

Dave

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