jacob jacob <opstkusr@xxxxxxxxx> writes: > On Mon, Mar 16, 2015 at 2:12 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >> jacob jacob <opstkusr@xxxxxxxxx> writes: >> >>> I also see the following in dmesg in the VM. >>> >>> [ 0.095758] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) >>> [ 0.096006] acpi PNP0A03:00: ACPI _OSC support notification failed, >>> disabling PCIe ASPM >>> [ 0.096915] acpi PNP0A03:00: Unable to request _OSC control (_OSC >>> support mask: 0x08) >> IIRC, For OSC control, after BIOS is done with (whatever initialization >> it needs to do), it clears a bit so that the OS can take over. This message, >> you are getting is a sign of a bug in the BIOS (usually). But I don't >> know if this is related to your problem. Does "dmesg | grep -e DMAR -e IOMMU" >> give anything useful ? > > Do not see anything useful in the output.. Ok, Thanks. Can you please post the output as well ? >>> [ 0.097072] acpi PNP0A03:00: fail to add MMCONFIG information, >>> can't access extended PCI configuration space under this bridge. >>> >>> Does this indicate any issue related to PCI passthrough? >>> >>> Would really appreciate any input on how to bebug this further. >> >> Did you get a chance to try a newer kernel ? > Currently am using 3.18.7-200.fc21.x86_64 which is pretty recent. > Are you suggesting trying the newer kernel just on the host? (or VM too?) Both preferably to 3.19. But it's just a wild guess. I saw i40e related fixes, particularly "i40e: fix un-necessary Tx hangs" in 3.19-rc5. This is not exactly what you are seeing but I was still wondering if it could help. Meanwhile, I am trying to get hold of a card myself to try and reproduce it at my end. Thanks, Bandan >>> On Fri, Mar 13, 2015 at 10:08 AM, jacob jacob <opstkusr@xxxxxxxxx> wrote: >>>>> So, it could be the i40e driver then ? Because IIUC, VFs use a separate >>>>> driver. Just to rule out the possibility that there might be some driver fixes that >>>>> could help with this, it might be a good idea to try a 3.19 or later upstream >>>>> kernel. >>>>> >>>> >>>> I tried with the latest DPDK release too (dpdk-1.8.0) and see the same issue. >>>> As mentioned earlier, i do not see any issues at all when running >>>> tests using either i40e or dpdk on the host itself. >>>> This is the reason why i am suspecting if it is anything to do with KVM/libvirt. >>>> Both with regular PCI passthrough and VF passthrough i see issues. It >>>> is always pointing to some issue with packet transmission. Receive >>>> seems to work ok. >>>> >>>> >>>> On Thu, Mar 12, 2015 at 8:02 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>>>> jacob jacob <opstkusr@xxxxxxxxx> writes: >>>>> >>>>>> On Thu, Mar 12, 2015 at 3:07 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>>>>>> jacob jacob <opstkusr@xxxxxxxxx> writes: >>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> Seeing failures when trying to do PCI passthrough of Intel XL710 40G >>>>>>>> interface to KVM vm. >>>>>>>> 0a:00.1 Ethernet controller: Intel Corporation Ethernet >>>>>>>> Controller XL710 for 40GbE QSFP+ (rev 01) >>>>>>> >>>>>>> You are assigning the PF right ? Does assigning VFs work or it's >>>>>>> the same behavior ? >>>>>> >>>>>> Yes.Assigning VFs worked ok.But this had other issues while bringing down VMs. >>>>>> Interested in finding out if PCI passthrough of 40G intel XL710 >>>>>> interface is qualified in some specific kernel/kvm release. >>>>> >>>>> So, it could be the i40e driver then ? Because IIUC, VFs use a separate >>>>> driver. Just to rule out the possibility that there might be some driver fixes that >>>>> could help with this, it might be a good idea to try a 3.19 or later upstream >>>>> kernel. >>>>> >>>>>>>> From dmesg on host: >>>>>>>> >>>>>>>>> [80326.559674] kvm: zapping shadow pages for mmio generation wraparound >>>>>>>>> [80327.271191] kvm [175994]: vcpu0 unhandled rdmsr: 0x1c9 >>>>>>>>> [80327.271689] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a6 >>>>>>>>> [80327.272201] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a7 >>>>>>>>> [80327.272681] kvm [175994]: vcpu0 unhandled rdmsr: 0x3f6 >>>>>>>>> [80327.376186] kvm [175994]: vcpu0 unhandled rdmsr: 0x606 >>>>>>> >>>>>>> These are harmless and are related to unimplemented PMU msrs, >>>>>>> not VFIO. >>>>>>> >>>>>>> Bandan >>>>>> -- >>>>>> 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 -- 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
