Re: [Xen-devel] Xen-unstable: xen panic RIP: dpci_softirq

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Friday, November 14, 2014, 6:05:28 PM, you wrote:

> On Fri, Nov 14, 2014 at 05:59:23PM +0100, Sander Eikelenboom wrote:
>> 
>> Friday, November 14, 2014, 4:43:58 PM, you wrote:
>> 
>> >>>> On 14.11.14 at 16:20, <linux@xxxxxxxxxxxxxx> wrote:
>> >> If it still helps i could try Andrews suggestion and try out with only 
>> >> commit aeeea485 ..
>> 
>> > Yes, even if it's pretty certain it's the second of the commits, verifying
>> > this would be helpful (or if the assumption is wrong, the pattern it's
>> > dying with would change and hence perhaps provide further clues).
>> 
>> > Jan
>> 
>> 
>> Ok with a revert of f6dd295 .. it survived cooking and eating a nice bowl of 
>> pasta without a panic. So it would probably be indeed that specific commit.

> Thank you for confirmation.

> Could you give some specifics on the guests? As in what kind of devices you
> are giving it - and more interestingly - what type of interrupt mechanism
> do they use (/proc/interrupts along with 'dmesg' | grep <name of driver> 
> should
> give some ideas).

> I wouldn't worry about the PV case as that bypasses the dpci codebase - just
> on the HVM side.

> Thanks again!

xen-pciback owns some more devices but these are assigned to started guests:

PV:
03:06.0 Multimedia audio controller: C-Media Electronics Inc CMI8738/CMI8768 
PCI Audio (rev 10)
        Subsystem: C-Media Electronics Inc CMI8738/C3DX PCI Audio Device
        Flags: bus master, medium devsel, latency 64, IRQ 22
        I/O ports at 7800 [size=256]
        Capabilities: [c0] Power Management version 2
        Kernel driver in use: pciback

HVM:
04:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 
03) (prog-if 30 [XHCI])
        Subsystem: Micro-Star International Co., Ltd. Device 4257
        Flags: bus master, fast devsel, latency 0, IRQ 40
        Memory at fddfe000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [50] Power Management version 3
        Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
        Capabilities: [90] MSI-X: Enable+ Count=8 Masked-
        Capabilities: [a0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff
        Capabilities: [150] Latency Tolerance Reporting
        Kernel driver in use: pciback

08:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 
03) (prog-if 30 [XHCI])
        Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard
        Flags: bus master, fast devsel, latency 0, IRQ 37
        Memory at fe0fe000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [50] Power Management version 3
        Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
        Capabilities: [90] MSI-X: Enable+ Count=8 Masked-
        Capabilities: [a0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff
        Capabilities: [150] Latency Tolerance Reporting
        Kernel driver in use: pciback

0a:00.0 Multimedia video controller: Conexant Systems, Inc. Device 8210
        Flags: bus master, fast devsel, latency 0, IRQ 47
        Memory at fe200000 (64-bit, non-prefetchable) [size=2M]
        Capabilities: [40] Express Endpoint, MSI 00
        Capabilities: [80] Power Management version 3
        Capabilities: [90] Vital Product Data
        Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [200] Virtual Channel
        Kernel driver in use: pciback


So for HVM it's two times MSI-X and one time intX (although it should be MSI 
capable so it seems)



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