[Pkg-xen-devel] DomU with PCI crashes when restored

[Sebastian Raring]

Kernel 2.6.18-1-xen-k7 (unstable)
Xen 3.0.3-1 (unstable)
OS: Debian Etch
Guest: Debian Etch/Ubuntu Edgy

This combination is the only one where I can create a domU with 
PCI-export (network card) and a normal one without to crash at the 
create of the domUs.
But when I save the domU to file and restore it, it crashes with the 
following error:

-- Start Log --
dom0:~# xm save dsletch test2
dom0:~# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      229     1 r-----    189.1
dns                                        1      128     1 -b----      0.1
dom0:~# ls -lsh
insgesamt 192M
  64M -rwxr-xr-x 1 root root  64M 2006-10-31 09:03 test1
129M -rwxr-xr-x 1 root root 128M 2006-10-31 09:17 test2
dom0:~# xm restore test2
dom0:~# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      229     1 r-----    190.8
dns                                        1      128     1 -b----      0.2
dsletch                                    7      128     1 -b----      0.0
dom0:~# xm console dsletch
------------[ cut here ]------------
kernel BUG at drivers/xen/core/evtchn.c:765!
invalid opcode: 0000 [#1]
SMP
Modules linked in: ipv6 8250 serial_core ext3 jbd mbcache dm_mirror 
dm_snapshot dm_mod raid1 md_mod 3c59x mii processor
CPU:    0
EIP:    0061:[<c0208f96>]    Not tainted VLI
EFLAGS: 00010006   (2.6.18-1-xen-k7 #1)
EIP is at irq_resume+0x30/0x28e
eax: 00000010   ebx: 00000000   ecx: 00000000   edx: 00000400
esi: 00000022   edi: 00000000   ebp: 00022000   esp: c7b51ef8
ds: 007b   es: 007b   ss: 0069
Process suspend (pid: 1248, ti=c7b50000 task=c0f41550 task.ti=c7b50000)
Stack: c0f41550 c012a161 c7b51f00 c7b51f00 00000000 00000002 c7b51f48 
c02097f2
        c1007280 c039400c c9003000 c0fa8c90 c01473fa c7b51f80 c02cc4c0 
c9004000
        c9004000 c0fafea0 c1000000 00000002 00000022 00000000 00022000 
c0209575
Call Trace:
  [<c012a161>] autoremove_wake_function+0x0/0x2d
  [<c02097f2>] map_pte_fn+0x22/0x40
  [<c01473fa>] apply_to_page_range+0x272/0x2bf
  [<c0209575>] gnttab_resume+0x96/0xad
  [<c02097d0>] map_pte_fn+0x0/0x40
  [<c0117ff0>] copy_process+0x6cd/0x10ac
  [<c020a5b5>] __do_suspend+0x286/0x3c5
  [<c0113316>] complete+0x2b/0x3d
  [<c020a32f>] __do_suspend+0x0/0x3c5
  [<c012a093>] kthread+0xc2/0xef
  [<c0129fd1>] kthread+0x0/0xef
  [<c0102969>] kernel_thread_helper+0x5/0xb
Code: c4 80 e8 8e f5 ff ff 31 d2 a1 e4 d9 2c c0 f0 0f ab 90 80 08 00 00 
42 81 fa 00 04 00 00 75 ea 31 c0 83 3c 85 00 65 37 c0 00 74 08 <0f> 0b 
fd 02 13 e8 2a c0 40 3d 00 01 00 00 75 e6 b8 00 9f 37 c0
EIP: [<c0208f96>] irq_resume+0x30/0x28e SS:ESP 0069:c7b51ef8

Message from syslogd at dsletch at Tue Oct 31 08:18:02 2006 ...
dsletch kernel: ------------[ cut here ]------------

Message from syslogd at dsletch at Tue Oct 31 08:18:02 2006 ...
dsletch kernel: kernel BUG at drivers/xen/core/evtchn.c:765!

Message from syslogd at dsletch at Tue Oct 31 08:18:02 2006 ...
dsletch kernel: invalid opcode: 0000 [#1]

Message from syslogd at dsletch at Tue Oct 31 08:18:02 2006 ...
dsletch kernel: SMP

M
-- End Log --

Is there a bugfix or a workaround?
I dont need this save/restore directly, but when the dom0 restarts, it 
is very bad when the domU crashes.

Thanks for your help

Sebastian