Re: Recurring Zombie (XenU used as a web server)

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On Thu, Sep 21, 2006, Russell McOrmond wrote:
> >> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=199944
> 
> Kwan Lowe wrote:
> >This is the bug report I'd found... It looks like yours is the same issue:
> >
> >https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=204468
> 
>   I've added a note there.  If people can leave their consoles open and 
> see if there is a kernel panic similar to the one that I reported, it 
> may be the same xennet related bug.
> 
>   I've observed the same problem on a number of machines I administer 
> (Mixed Intel, AMD, etc), and each time it seems to come down to the same 
> xennet issue.

Here's a recent crash. I can't run 2187 because it crashes almost straight
away (and I think I emailed the crashdump to the list already.)

Its still worrying that this oops takes out networking for all VMs..




Adrian

BUG: unable to handle kernel NULL pointer dereference at virtual address 000000bc
 printing eip:
c908e1ad
*pde = ma 1509f067 pa 01ff3067
*pte = ma 00000000 pa fffff000
Oops: 0002 [#1]
SMP
Modules linked in: ipv6 xennet dm_snapshot dm_zero dm_mirror dm_mod raid1
CPU:    0
EIP:    0061:[<c908e1ad>]    Not tainted VLI
EFLAGS: 00210046   (2.6.17-1.2157_FC5xenU #1)
EIP is at network_tx_buf_gc+0xc4/0x1b7 [xennet]
eax: 00000066   ebx: 00000032   ecx: c6540cfc   edx: 00000000
esi: 00000001   edi: c6540400   ebp: 0000002c   esp: c0651edc
ds: 007b   es: 007b   ss: 0069
Process swapper (pid: 0, threadinfo=c0650000 task=c05f1800)
Stack: <0>c6540cfc 00000000 00000000 00000004 c6540000 001ece31 001ece32 001ece12
       00000000 c6540488 c6540400 c6540000 c908f150 c01b5e80 00000000 00000000
       00000107 c043a57d 00000107 c6540000 c0651f88 c0651f88 00000107 c0643780
Call Trace:
 <c908f150> netif_int+0x24/0x66 [xennet]  <c043a57d> handle_IRQ_event+0x42/0x85
 <c043a64d> __do_IRQ+0x8d/0xdc  <c040665a> do_IRQ+0x1a/0x25
 <c0519efd> evtchn_do_upcall+0x66/0x9f  <c0404d79> hypervisor_callback+0x3d/0x48
 <c0407a6a> safe_halt+0x84/0xa7  <c0402bde> xen_idle+0x46/0x4e
 <c0402cfd> cpu_idle+0x94/0xad  <c0655772> start_kernel+0x346/0x34c
Code: b4 9f 00 09 00 00 50 e8 9d c5 48 f7 c7 84 9f 00 09 00 00 00 00 00 00 8b 87 f4 00 00 00 89 84 9f f4 00 00 00 89 9f f4 00 00 00 90 <ff> 8d 90 00 00 00 0f 94 c0 83 c4 10 84 c0 74 62 bb 00 e0 ff ff
EIP: [<c908e1ad>] network_tx_buf_gc+0xc4/0x1b7 [xennet] SS:ESP 0069:c0651edc
 <0>Kernel panic - not syncing: Fatal exception in interrupt

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