Hi,
back in Dec 2010 Jan Kiszka posted a number of patches that deal with
IRQ sharing.
[PATCH 0/5] pci-assign: Host IRQ sharing suppport + some fixes and cleanups
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/64601
[PATCH v3 0/4] KVM & genirq: Enable adaptive IRQ sharing for
passed-through devices
http://thread.gmane.org/gmane.linux.kernel/1076440
[PATCH 0/2] Small KVM device assignment cleanups
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/64515
What do I need to do to apply these patches to my system?
The server I'm working on is running Proxmox 1.8 with upgraded
2.6.35-1-pve kernel (previously 2.6.32-4-pve) and qemu-kvm 0.14.1.
Do I need to upgrade to a newer kernel, or upgrade qemu-kvm (e.g.
0.15.0), or both?
The problem that I'm hoping to solve is an IRQ conflict. The Intel
DQ67SW motherboard only has 1 PCI slot and no BIOS support for assigning
IRQs. KVM PCI passthrough only works with the nousb kernel parameter,
otherwise the ehci_hcd:usb1 conflicts with the PCI's assigned IRQ 16.
This is a problem because I also need to USB passthrough a dongle
required by the software (in WinXP guest).
Thanks for any pointers,
Mick
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