Re: virtio_net sometimes didn't work

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Does this message appear on boot, or after some stress?
on boot, and only appear when boot from network.

Which qemu-kvm version?
[root@kvm-4slot ~]# /usr/libexec/qemu-kvm --version
QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2), Copyright (c)
2003-2008 Fabrice Bellard

Does cherry-picking 3fff0179e33cd7d0a688dab65700c46ad089e934 help?
the virtio_pci have already used this patch, still have this problem.

What does info irqs show in qemu?
how to collect this information?

but I found if modify the slot number of balloon device from 0x03 to
0x09, the problem solved.

    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09'
function='0x0'/>
    </memballoon>

and i found someone else also meet this problem.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/584675



2010/11/25 Michael S. Tsirkin <mst@xxxxxxxxxx>:
> On Thu, Nov 25, 2010 at 10:21:24PM +0800, lidong chen wrote:
>> [version]
>> the host os version is 2.6.32
>
> Which qemu-kvm version?
>
>> the guest os version is 2.6.16
>>
>> [dmesg]
>> ACPI: (supports S3 S4 S5)
>> Freeing unused kernel memory: 200k freed
>> input: ImExPS/2 Generic Explorer Mouse as /class/input/input2
>> ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 11
>> ACPI: PCI Interrupt 0000:00:03.0[A] -> Link [LNKC] -> GSI 11 (level,
>> high) -> IRQ 11
>> io address 0001c040ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 10
>> ACPI: PCI Interrupt 0000:00:04.0[A] -> Link [LNKD] -> GSI 10 (level,
>> high) -> IRQ 10
>> io address 0001c060ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10
>> ACPI: PCI Interrupt 0000:00:05.0[A] -> Link [LNKA] -> GSI 10 (level,
>> high) -> IRQ 10
>> io address 0001c080ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
>> ACPI: PCI Interrupt 0000:00:06.0[A] -> Link [LNKB] -> GSI 11 (level,
>> high) -> IRQ 11
>> io address 0001c0a0<6>ACPI: PCI Interrupt 0000:00:07.0[A] -> Link
>> [LNKC] -> GSI 11 (level, high) -> IRQ 11
>> io address 0001c0c0<6>ACPI: PCI Interrupt 0000:00:08.0[A] -> Link
>> [LNKD] -> GSI 10 (level, high) -> IRQ 10
>> io address 0001c0e0
>> irq 11: nobody cared (try booting with the "irqpoll" option)
>>  [<c01457b0>] __report_bad_irq+0x2b/0x69
>>  [<c0145979>] note_interrupt+0x18b/0x1b2
>>  [<c01452a9>] handle_IRQ_event+0x26/0x51
>>  [<c014537f>] __do_IRQ+0xab/0xdc
>>  [<c0106445>] do_IRQ+0x46/0x53
>>  [<c0104e8a>] common_interrupt+0x1a/0x20
>>  [<c01276f2>] __do_softirq+0x4f/0xc2
>>  [<c0127793>] do_softirq+0x2e/0x32
>>  [<c0104f3c>] apic_timer_interrupt+0x1c/0x30
>>  [<c0102d55>] default_idle+0x2e/0x5c
>>  [<c0102e14>] cpu_idle+0x91/0xad
>>  [<c03946e5>] start_kernel+0x34c/0x353
>> handlers:
>> [<f88252ee>] (vp_interrupt+0x0/0x3e [virtio_pci])
>> Disabling IRQ #11
>
> Does this message appear on boot, or after some stress?
> Does cherry-picking 3fff0179e33cd7d0a688dab65700c46ad089e934 help?
> Happens with a newer kernel as guest?
> What does info irqs show in qemu?
>
>
> --
> MST
> --
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