https://bugzilla.kernel.org/show_bug.cgi?id=107561 Bug ID: 107561 Summary: 4.2 breaks PCI passthrough in QEMU/KVM Product: Virtualization Version: unspecified Kernel Version: 4.2 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: fhorn50@xxxxxxxxx Regression: No QEMU/KVM VM's using PCI pass-through are taking a long time to boot, or never booting. The issue is only present when the VM has more then ~2.5G of ram. I was able to get a VM with 6G to boot, but I had to let it run overnight. More info can be found in this thread: https://bbs.archlinux.org/viewtopic.php?id=203240 Someone in the forum seems to have narrowed it down to a a set of commits regarding kvm and mtrr in 4.1-rc2 that are in the mainline kernel as of 4.2. Specifically commit fa61213746a706dd975661151c35795ca4dd82c2 KVM: MTRR: simplify kvm_mtrr_get_guest_memory_type. -- You are receiving this mail because: You are watching the assignee of the bug. -- 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
