2010/3/31 Alexander Graf <agraf@xxxxxxx>: > > On 31.03.2010, at 00:27, Kenni Lund wrote: > >> 2010/3/30 Chris Wright <chrisw@xxxxxxxxxx>: >>> * Kenni Lund (kenni@xxxxxxx) wrote: >>>> Client dmesg: http://pastebin.com/uNG4QK5j >>>> Host dmesg: http://pastebin.com/jZu3WKZW >>>> >>>> I just verified it and I do get the call trace in the host (which >>>> disables IRQ 19, used by the PCI USB card), exactly at the same second >>> >>> It looks like IRQ 19 is shared between the ehci controller and the >>> ivtv tuner. What do you see in /proc/interrupts on the host (before >>> you unbind and after you bind to pci stub)? >> >> Ahh, and even if the ivtv module is not loaded, I will still have a >> shared IRQ, right? I didn't see ivtv in /proc/interrupts before, as I >> unload the ivtv driver on boot in /etc/rc.local, before unbinding the >> ivtv tuner and binding it to pci stub. (the ivtv tuner is normally >> assigned to the same guest, but not now while testing the PCI USB >> card). >> >> If I don't unload (and unbind/bind) the ivtv driver/tuner on boot in >> /etc/local, I get the following in /proc/interrupts on a clean boot: >> http://pastebin.com/SFQj58LC >> >> If I now unbind and bind the PCI USB card to pci stub, I get no >> changes in /proc/interrupts. >> >> So I suppose I'll need to get rid of this shared IRQ before I can >> conclude anything on the patch in git. Hmm, is there some cleaver way >> of fixing this in Linux, or do I have to fix it by changing BIOS IRQ >> settings, disabling hardware and/or moving the hardware around in >> various PCI slots? > > The easiest thing coming to mind is to unplug the ivtv card for now. It's really only to verify that the patch does something useful :-). This was not sufficient. Same issue with the ivtv card unplugged...if I interpret the content of /proc/interrupt correctly, the USB PCI cards uses 4 IRQs and out of these three IRQs are still shared with other components. The card uses IRQ 16, 18, 19, 20: pci-stub 0000:02:01.0: PCI INT B -> GSI 18 (level, low) -> IRQ 18 pci-stub 0000:02:01.1: PCI INT C -> GSI 16 (level, low) -> IRQ 16 pci-stub 0000:02:01.2: PCI INT D -> GSI 20 (level, low) -> IRQ 20 pci-stub 0000:02:01.3: PCI INT A -> GSI 19 (level, low) -> IRQ 19 Only IRQ 20 gets "kvm_assigned_intx_device" after unbinding+binding+qemu-kvm launch: interrupts before: http://pastebin.com/DdJEv29z interrupts after: http://pastebin.com/zasWEZsL It seems like i still have shared IRQs with the onboard USB controller as well as the PATA controller. In the BIOS i have the option of setting the IRQ of "PCI Card 1" and "PCI Card 2". I tried changing these into IRQ 10 and 11 (which are free according to /proc/interrupts), but it changed absolutely nothing in /proc/interrupts after booting(?) :-( Any kind of hint which could lead me in hte right direction, would be highly appreciated...thanks. Best Regards Kenni -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
