Re: [Xen-devel] From XenProject.org Q&A: Kernel panic - xen-netfront driver bug?

[Russ Pavlicek <russell.pavlicek@xxxxxxxxxxxxxx>]

Thanks Annie.  I will pass this on to Alex and see what the reply is.

On Fri, Oct 11, 2013 at 10:11 PM, annie li <annie.li@xxxxxxxxxx> wrote:
> Hi Russ,
>
> Although I am not so sure, this is likely the recent issue which was finally
> fixed by http://lists.xen.org/archives/html/xen-devel/2013-09/msg01143.html.
> That fix mainly connects with larger MTU(for example, 9000), and using less
> MTU size does not hit that issue. Could you check this in your setup?
>
> Thanks
> Annie
>
>
> On 2013-10-12 4:23, Russ Pavlicek wrote:
>>
>> Alex asks the following question on the XenProject.org Q&A system.
>> Can anyone provide an answer for me to post (or can someone post an
>> answer directly)?
>>
>> Thanks!
>>
>> ----------------------
>>
>> I'm running Xen 4.3.0-7 on Arch, compiled from AUR.
>>
>> I have tried reinstalling Xen with 4.3.1-0 and 4.3.0-4 but had the
>> same issue with both. I've been very happy with the setup until now.
>>
>> I only run into this issue when transferring large amounts of data
>> between my Windows VM and my unRAID vm. In this case it was my 80GB
>> photo library, so lots of small files - not one giant one, that
>> reliably causes this kernel panic. It happens after less than 1 minute
>> into the transfer.
>>
>> I frequently transfer 10GB+ movie files from another VM, which runs
>> Arch also, as my usenet box. This occurs without issue several times a
>> day so it appears to me that the issue lies in the Windows / unRAID
>> communication specifically. Beyond me to know what though. HELP!?
>>
>> I'm not sure what other information would be needed to help me so
>> please if you need more, just ask.
>>
>> ------------[ cut here ]------------
>> kernel BUG at drivers/net/xen-netfront.c:306!
>> invalid opcode: 0000 [#1] SMP
>> Modules linked in: md_mod sg ahci mvsas libsas libahci
>> scsi_transport_sas coretemp hwmon
>> Pid: 0, comm: swapper/0 Not tainted 3.9.6p-unRAID #1
>> EIP: 0061:[] EFLAGS: 00010286 CPU: 0
>> EIP is at xennet_alloc_rx_buffers+0x1bc/0x2bd
>> EAX: 00000292 EBX: dc4c8440 ECX: 0000005e EDX: 0000005e
>> ESI: 000002bd EDI: dce873c0 EBP: c1571d74 ESP: c1571d3c
>>   DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
>> CR0: 80050033 CR2: 40ea7000 CR3: 1c587000 CR4: 00042660
>> DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
>> DR6: ffff0ff0 DR7: 00000400
>> Process swapper/0 (pid: 0, ti=c1570000 task=c158004c task.ti=c1570000)
>> Stack:
>>   00000000 0000005d dc4c9110 005ea3ac dcdac000 0000005d 00000049 dc4c8ce4
>>   dc4c8000 00010215 0001025e dc4c8440 dc4c8440 00000040 c1571e2c c1345836
>>   c3ae26c0 c10296bf 00017e80 c15ab100 00000750 c10296bf c1571e00 c1571df0
>> Call Trace:
>>   [] xennet_poll+0x9b6/0xa30
>>   [] ? pvclock_clocksource_read+0x99/0xbb
>>   [] ? pvclock_clocksource_read+0x99/0xbb
>>   [] ? xen_clocksource_read+0x19/0x1b
>>   [] ? gnttab_end_foreign_transfer_ref_v1+0xe/0x54
>>   [] net_rx_action+0x5d/0x16f
>>   [] __do_softirq+0x96/0x158
>>   [] irq_exit+0x38/0x71
>>   [] xen_evtchn_do_upcall+0x20/0x2a
>>   [] xen_do_upcall+0x7/0xc
>>   [] ? xen_hypercall_sched_op+0x7/0x20
>>   [] ? xen_safe_halt+0x12/0x1f
>>   [] default_idle+0x1f/0x35
>>   [] cpu_idle+0x55/0x74
>>   [] rest_init+0x58/0x5a
>>   [] start_kernel+0x2c4/0x2ca
>>   [] ? repair_env_string+0x53/0x53
>>   [] i386_start_kernel+0x79/0x7d
>>   [] xen_start_kernel+0x614/0x61f
>> Code: 00 00 c7 47 04 00 00 00 00 89 42 04 89 10 8b 55 e8 89 57 14 0f
>> b6 4d f0 0f b7 d1 8d 82 34 02 00 00 66 89 4d d6 83 3c 83 00 74 04  0b
>> eb fe 89 3c 83 8b 45 d0 89 55 cc e8 79 c7 f7 ff 8b 55 cc
>> EIP: [] xennet_alloc_rx_buffers+0x1bc/0x2bd SS:ESP 0069:c1571d3c
>> ---[ end trace f1245c97afa1ffd0 ]---
>> Kernel panic - not syncing: Fatal exception in interrupt
>>
>> _______________________________________________
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>> Xen-devel@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-devel
>
>

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