Re: [Xen-devel] Xen-unstable: pci-passthrough "irq 16: nobody cared" on HVM guest shutdown on irq of device not passed through.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.09.14 at 11:00, <linux@xxxxxxxxxxxxxx> wrote:

> Friday, September 26, 2014, 8:50:04 AM, you wrote:
> 
>>>>> On 25.09.14 at 19:02, <linux@xxxxxxxxxxxxxx> wrote:
>>> lspci gives only one device with IRQ 16, the soundcontroller 
>>> 
>>> 00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia 
>>> (Intel HDA) (rev 40)
>>>         Subsystem: Micro-Star International Co., Ltd. Device 7640
>>>         Flags: bus master, slow devsel, latency 64, IRQ 16
>>>         Memory at fdbf8000 (64-bit, non-prefetchable) [size=16K]
>>>         Capabilities: [50] Power Management version 2
>>>         Kernel driver in use: snd_hda_intel
>>> 
>>> On boot i do get a message  "Already setup the GSI :16", however that seems 
>>> to happen for multiple devices and irq/gsi's.
> 
>> And is quite normal.
> 
>>> ##Cold boot of the host system
>>>     [   35.556728] xen: registering gsi 16 triggering 0 polarity 1
>>>     [   35.573157] xen: --> pirq=16 -> irq=16 (gsi=16)
>>>     (XEN) [2014-09-25 13:08:55.771] IOAPIC[0]: Set PCI routing entry (6-16 
>>> -> 
> 0x89 -> IRQ 16 Mode:1 Active:1)
> 
>> So you managed to zap the one message presumably right before
>> this which would indicate which device this is done for (just like is
>> the case below).
> 
> Ah ok, i did send the complete "context" in the complete serial.log with the 
> 
> first mail (however that is that large and everything spread it's also hard 
> to 
> make sense of).
> The problem is .. there is no direct context in the logging to a particular 
> device .. (at least i don't see it):

Does your distro have a way to serialize the boot process (such that
drivers get loaded and initialized one after the other)?

Jan


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