[Xen-bugs] [Bug 473] New: rebooting one guestion domain disable vif's for other guest domains

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=473

           Summary: rebooting one guestion domain disable vif's for other
                    guest domains
           Product: Xen
           Version: 3.0-testing
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Tools
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: wenshengwang@xxxxxxxxx


I found reboot dom 1 will disable vif1?.0 (like vif11.0 vif12.0 vif13.0 ...);
rebooting dom2 will disable vif2?.0, rebooting dom3 will disable vif3?.0

To reproduce, prepare 2 lvm for guest domain for example /dev/vg0/breezy and
/dev/vg0/sarge
Their config files are in /etc/xen/auto/breezy and /etc/xen/auto/sarge

Bring one guest domain up first, it will have a domain id 1
#xm create /etc/xen/auto/breezy

Mount the other lvm to /mnt and create guest domain.  Because lvm is mounted,
domain creation will not be successful, it will be in paused state. This is
purely for incrementing dom id number.
#mount /dev/vg0/sarge /mnt
#for i in `seq 2 10`;do xm create /etc/xen/auto/sarge || xm destroy $i;done

umount that lvm and create that domain, the domain will have id 11
#umount /mnt
#xm create /etc/xen/auto/sarge

Now 2 domainU alive, "brctl show" show vif0.0 vif1.0 vif11.0
#xm list
#brctl show

now reboot domain 1
#xm shutdown -R 1

What should happen is that after this there should be 2 domain with id 11 and 12
using vif11.0 and vif12.0

What actually happen is:
1, there is only one domain: domain 11
2, vif11 dissapeared.
3. there is dangling vif12.0 
4, domain 11 dead

here is what I get if I do "xm console 11"
----------------------------------------------------------------------
[root@m5 ~]# xm console 11
Unable to handle kernel paging request at virtual address f578ee01
 printing eip:
c0110220
00560000 -> *pde = 00000001:5d409001
0059e000 -> *pme = 00000001:6c190067
00040000 -> *pte = 00000000:00000000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU:    0
EIP:    0061:[<c0110220>]    Not tainted VLI
EFLAGS: 00010086   (2.6.12.6-xenU)
EIP is at send_IPI_mask_bitmask+0x20/0x120
eax: f578ee00   ebx: 00000000   ecx: 00000000   edx: 00000000
esi: 00000000   edi: f578c000   ebp: 00000000   esp: c0586020
ds: 007b   es: 007b   ss: 0069
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c01162c6
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c01161af
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c01161af
................
----------------------------------------------------------------

I use xen3.0-testing (changeset 8259:5baa96bedc13)
dom0 OS is fedora core 4.  use default bridge configuration.
guest domains are Ubuntu 5.1 and Debian3.1, prepared with debootstrap, all
working properly.

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