[Xen-bugs] [Bug 780] New: dom0 panic with netbak/netfront as modules on IA64. (again)

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=780

           Summary: dom0 panic with netbak/netfront as modules on IA64.
                    (again)
           Product: Xen
           Version: unstable
          Platform: IA64
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P3
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: takebe_akio@xxxxxxxxxxxxxx


I try to use netback/netfron as modules on ia64.
When I enabled network, dom0 panic and the following message is shown.

(XEN) *** CALLED SAL_SET_VECTORS 1.  IGNORED...
(XEN) MCA related initialization done
SMP: Allowing 1 CPUs, 0 hotplug CPUs
Built 1 zonelists
Kernel command line:  root=/dev/hda1 ro 3
PID hash table entries: 2048 (order: 11, 65536 bytes)
lookup_domain_mpa: d 0xf000000007c0c080 id 3 current 0xf000000007c30000 id 0
(XEN) lookup_domain_mpa: bad mpa 0xffffc019064 (=> 0x20000000)
(XEN) Warning: UC to WB for mpaddr=ffffc019064
kernel BUG at drivers/xen/netback/netback.c:630!
swapper[0]: bugcheck! 0 [1]
Modules linked in: netloop netbk blkbk

Pid: 0, CPU 0, comm:              swapper
psr : 0000001008026010 ifs : 800000000000099a ip  : [<a00000020003e870>]    Not
tainted
ip is at net_rx_action+0xd70/0x18e0 [netbk]
unat: 0000000000000000 pfs : 800000000000099a rsc : 0000000000000008
rnat: 0000000000000040 bsps: 000000000000000a pr  : 000000000005a6a5
ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
csd : 0000000000000000 ssd : 0000000000000000
b0  : a00000020003e870 b6  : a0000001000baa60 b7  : a000000100614b40
f6  : 1003e0000000000000028 f7  : 1003e28f5c28f5c28f5c3
f8  : 1003e00000000000000fa f9  : 1003e0000000032000000
f10 : 1003e000000003b9aca00 f11 : 1003ed6bf94d5e57a42bd
r1  : a000000101024d10 r2  : a000000100e492f8 r3  : a000000100e492f8
r8  : 0000000000000034 r9  : f100000000000001 r10 : 0000000000000000
r11 : f100000000004c20 r12 : a000000100c0fb20 r13 : a000000100c08000
r14 : 0000000000004000 r15 : 0000000000000001 r16 : f100000000004c18
r17 : e00000001a1dfde8 r18 : 0000000000000000 r19 : 0000000000000004
r20 : 0000000000000000 r21 : 0000000000000000 r22 : a000000100c08f14
r23 : e00000001a1d8040 r24 : e000000001015208 r25 : e000000001015200
r26 : e0000000010151e0 r27 : 0000000000000073 r28 : a000000100c08030
r29 : e000000001014a88 r30 : 0000000000000000 r31 : 0000000000000000

Call Trace:
 [<a00000010001af70>] show_stack+0x50/0xa0
                                sp=a000000100c0f690 bsp=a000000100c09430
 [<a00000010001b840>] show_regs+0x820/0x840
                                sp=a000000100c0f860 bsp=a000000100c093e0
 [<a0000001000416d0>] die+0x1d0/0x3e0
                                sp=a000000100c0f860 bsp=a000000100c09398
 [<a000000100041920>] die_if_kernel+0x40/0x60
                                sp=a000000100c0f880 bsp=a000000100c09368
 [<a000000100041b70>] ia64_bad_break+0x230/0x480
                                sp=a000000100c0f880 bsp=a000000100c09340
 [<a000000100068900>] xen_leave_kernel+0x0/0x3b0
                                sp=a000000100c0f950 bsp=a000000100c09340
 [<a00000020003e870>] net_rx_action+0xd70/0x18e0 [netbk]
                                sp=a000000100c0fb20 bsp=a000000100c09270
 [<a000000100091a00>] tasklet_action+0x300/0x5a0
                                sp=a000000100c0fbb0 bsp=a000000100c09238
 [<a000000100090550>] __do_softirq+0x1f0/0x380
                                sp=a000000100c0fbb0 bsp=a000000100c091a8
 [<a000000100090820>] do_softirq+0x140/0x2a0
                                sp=a000000100c0fbb0 bsp=a000000100c09140
 [<a000000100090b90>] irq_exit+0x70/0xa0
                                sp=a000000100c0fbb0 bsp=a000000100c09128
 [<a00000010068fd90>] evtchn_do_upcall+0x170/0x240
                                sp=a000000100c0fbb0 bsp=a000000100c090a0
 [<a000000100068900>] xen_leave_kernel+0x0/0x3b0
                                sp=a000000100c0fbb0 bsp=a000000100c090a0
 [<e000000000000810>] 0xe000000000000810
                                sp=a000000100c0fd80 bsp=a000000100c09050
 [<a000000100069070>] xen_pal_call_static+0xd0/0x100
                                sp=a000000100c0fd80 bsp=a000000100c09030
 <0>Kernel panic - not syncing: Aiee, killing interrupt handler!
 (XEN) Domain 0 crashed: rebooting machine in 5 seconds.

I look like this issue is caused by the following patches.
http://xenbits.xensource.com/ext/xen-ia64-unstable.hg?cs=c757ebffd500

We can probably resolve this issue.
1. Tristan's xencomm patches is applied. 
   (I test by using xen-ia64-unstable,
    but these patches have some issue.)
2. revert the below patch. 
   (I have not test yet.)
3. built in these modules. 
   (I have not test yet.)

I think the best way is 1.
But Tristan's patches still have some issues.

Best Regards,

Akio Takebe


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