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xen-devel
RE: [Xen-devel] MSI causing softpanics in guest
Are you using MSI or MSI-X?
I remember there are some bugfixes related to MSI-X recently. What are the
changsets you are using for xen and PV kernel?
Shan Haitao
-----Original Message-----
From: Anish Bhatt [mailto:anish@xxxxxxxxxx]
Sent: 2008年9月21日 1:16
To: Keir Fraser
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Shan, Haitao; Jan Beulich
Subject: Re: [Xen-devel] MSI causing softpanics in guest
I have put msi=1 in grub in 3.3 & unstable, don't know why its still not
working though..
-anish
Keir Fraser wrote:
> On 3.3.0 you need to specify msi=1 on Xen's command line to enable MSI. In
> xen-unstable, MSI support is always enabled.
>
> I changed a check in evtchn_get_xen_pirq() into a BUG_ON() as it looks to me
> like it should never trigger. Jan Beulich was the original authour of that
> function -- cc'ed in case he can indicate whether I've actually broken the
> function. :-)
>
> -- Keir
>
> On 19/9/08 20:53, "Anish Bhatt" <anish@xxxxxxxxxxxxx> wrote:
>
>
>> lspci shows MSI enabled for PCI device. PCI passthrough works fine.
>> However, as soon as the MSI driver for card is insmodded, kernel panics.
>> This is on xen-unstable. Tried the same with xen-3.3.0 which is
>> supposed to have MSI passthrough, but the same guest shows MSI as disabled.
>> Any else seen this bug, or know of a workaround ?
>>
>> Trace is as follows :
>>
>> ------------[ cut here ]------------
>> kernel BUG at
>>
>>
> /usr/src/xen/xen-unstable.hg/linux-2.6.18-xen.hg/drivers/xen/core/evtchn.c:809>
> !
>
>> invalid opcode: 0000 [#1]
>> SMP
>> Modules linked in: nfemsg nfdvnet ipv6 binfmt_misc dm_mod nfe usbcore
>> ext3 jbd processor fuse
>> CPU: 0
>> EIP: 0061:[<c02487f5>] Tainted: GF VLI
>> EFLAGS: 00210097 (2.6.18.8-xen #2)
>> EIP is at evtchn_get_xen_pirq+0x35/0x40
>> eax: ffffffff ebx: 00000002 ecx: c0372e60 edx: 00000000
>> esi: c2103560 edi: c03d3080 ebp: 000004f9 esp: ed385dac
>> ds: 007b es: 007b ss: 0069
>> Process modprobe (pid: 2590, ti=ed384000 task=ed7b1100 task.ti=ed384000)
>> Stack: c0248aef 00000000 00000000 00000000 00000000 00000000 00000000
>> 00000000
>> 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>> 00000000
>> 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>> 00000000
>> Call Trace:
>> [<c0248aef>] startup_pirq+0x3f/0x250
>> [<c0150b50>] setup_irq+0x160/0x1b0
>> [<ee0dd270>] nfe_interrupt_handler+0x0/0x30 [nfemsg]
>> [<c0150c43>] request_irq+0xa3/0xc0
>> [<ee02c8ad>] nfemsg_module_init+0x8ad/0x133e [nfemsg]
>> [<c030531b>] cond_resched+0x2b/0x40
>> [<c0305369>] wait_for_completion+0x19/0xf0
>> [<c0142818>] sys_init_module+0x148/0x1b50
>> [<c010595f>] syscall_call+0x7/0xb
>> Code: 00 00 89 d1 d3 e0 85 05 c4 2c 42 c0 74 1a 8b 14 95 c0 c0 44 c0 89
>> d0 c1 e8 1c 83 e8 01 75 0c c1 ea 0c 81 e2 ff ff 00 00 89 d0 c3 <0f> 0b
>> 29 03 a4 f1 32 c0 eb ea 90 83 ec 08 89 74 24 04 89 c6 a1
>> EIP: [<c02487f5>] evtchn_get_xen_pirq+0x35/0x40 SS:ESP 0069:ed385dac
>> ### card [0] start: host progs ###
>> -bash-3.2#
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: ------------[ cut here ]------------
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: kernel BUG at
>>
>>
> /usr/src/xen/xen-unstable.hg/linux-2.6.18-xen.hg/drivers/xen/core/evtchn.c:809>
> !
>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: invalid opcode: 0000 [#1]
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: SMP
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: CPU: 0
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: EIP is at evtchn_get_xen_pirq+0x35/0x40
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: eax: ffffffff ebx: 00000002 ecx: c0372e60 edx: 00000000
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: esi: c2103560 edi: c03d3080 ebp: 000004f9 esp: ed385dac
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: ds: 007b es: 007b ss: 0069
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: Process modprobe (pid: 2590, ti=ed384000 task=ed7b1100
>> task.ti=ed384000)
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: Stack: c0248aef 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: 00000000 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: 00000000 00000000 00000000 00000000 00000000 00000000
>> 00000000 00000000
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: Call Trace:
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: Code: 00 00 89 d1 d3 e0 85 05 c4 2c 42 c0 74 1a 8b 14 95 c0 c0
>> 44 c0 89 d0 c1 e8 1c 83 e8 01 75 0c c1 ea 0c 81 e2 ff ff 00 00 89 d0 c3
>> <0f> 0b 29 03 a4 f1 32 c0 eb ea 90 83 ec 08 89 74 24 04 89 c6 a1
>>
>> Message from syslogd@drake at Sep 19 15:36:44 ...
>> kernel: EIP: [<c02487f5>] evtchn_get_xen_pirq+0x35/0x40 SS:ESP
>> 0069:ed385dac
>>
>
>
>
--
As long as the music's loud enough, we won't hear the world falling apart.
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