On Sun, Oct 11, 2009 at 4:51 PM, Daniel Bareiro <daniel-listas@xxxxxxx> wrote: > Hi, all! > > On Saturday, 22 August 2009 10:59:47 -0300, > Daniel Bareiro wrote: > >> According to I see in this document [1], is necessary that is loaded >> two modules in the guest: acpiphp and pci_hotplug. >> >> The pci_hotplug module is loaded. Nevertheless, in spite of existing >> the acpiphp module, cannot be loaded: >> >> chandra:~# lsmod|grep pci_hotplug >> pci_hotplug 23460 0 >> >> chandra:~# modprobe acpiphp >> FATAL: Error inserting acpiphp >> (/lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko): No such device >> >> chandra:~# locate acpiphp | grep 686 >> /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko >> /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp_ibm.ko >> >> >> Which could be being the problem? > > I was doing other tests this time with Linux 2.6.31.2 compiled by myself > from the sources of kernel.org. This time with loading the acpiphp > module, the pci_hotplug module was loaded automatically without I get > some type of error message. > > central:~# lsmod | grep acpiphp > central:~# > central:~# modprobe acpiphp > central:~# > central:~# lsmod | grep acpiphp > acpiphp 22140 0 > pci_hotplug 29024 1 acpiphp > > > Then, I tried to add a disk of the following way in host: > > (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio > OK domain 0, bus 0, slot 5, function 0 > > In the guest: > > Oct 11 18:09:01 central kernel: [ 833.403875] pci 0000:00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2 > Oct 11 18:09:01 central kernel: [ 833.406337] decode_hpp: Could not get hotplug parameters. Use defaults > Oct 11 18:09:01 central kernel: [ 833.430492] virtio-pci 0000:00:05.0: enabling device (0000 -> 0001) > Oct 11 18:09:01 central kernel: [ 833.452268] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 > Oct 11 18:09:01 central kernel: [ 833.454668] virtio-pci 0000:00:05.0: PCI INT A -> Link[LNKA] -> GSI 10 (level, high) -> IRQ 10 > Oct 11 18:09:01 central kernel: [ 833.500051] Clocksource tsc unstable (delta = -148257950 ns) > Oct 11 18:09:01 central kernel: [ 833.566755] vda: vda1 > > > Then I attempt to remove the device assuring previously that it is not > being used in guest: > > (qemu) pci_del 5 > > > In the guest: > > Oct 11 18:13:32 central kernel: [ 1104.144179] virtio-pci 0000:00:05.0: PCI INT A disabled > > > But if I want to add the device again, I get a segmentation fault of the > process that handles this virtual machine: > > (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio > Connection closed by foreign host. I can actually confirm this behavior. I've been struggling with this for a couple of days now. CC'ing QEMU, as I've discussed this a bit with Anthony Liguori. There's at least two related bugs we've been tracking: * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/432154 * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/419590 :-Dustin -- 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
