On Tue, 6 Aug 2024 at 08:10, Daniel Wagner <dwagner@xxxxxxx> wrote: > The only stall I was able to trigger > reliable was with qemu's PCI emulation. It looks like when a CPU is > offlined, the PCI affinity is reprogrammed but qemu still routes IRQs to > an offline CPU instead to newly programmed destination CPU. All worked > fine on real hardware. Hi Daniel, Please file a QEMU bug report here (or just reply to this emails with details on how to reproduce the issue and I'll file the issue on your behalf): https://gitlab.com/qemu-project/qemu/-/issues We can also wait until your Linux patches have landed if that makes it easier to reproduce the bug. Thanks! Stefan