Hang on Alder Lake with multiple cores
Host environment
- Operating system: Fedora 35
- OS/kernel version: 5.16.0-0.rc5.35.fc36.x86_64 vanilla
- Architecture: x86
- QEMU flavor: qemu-system-x86_64
- QEMU version: 6.1.0
- QEMU command line:
./qemu-system-x86_64 -M q35 -m 4096 -enable-kvm -cdrom fedora35live.iso -smp 8,sockets=1,dies=1,cores=4,threads=2
Emulated/Virtualized environment
- Operating system: Windows 11, Fedora 35
- OS/kernel version: 5.15.6-200.fc35.x86_64
- Architecture: x86
Description of problem
The guest silently hangs after a few seconds or minutes. No output in log, no errors in guest.
Steps to reproduce
- Start guest, do anything or nothing for a few minutes
Additional information
More cores seem to make it less stable. With a single core, I haven't had a problem but at 8 cores it usually doesn't make it much past login on Windows or Linux.
The guests are stable with 8 cores if I pin the vcpus to P cores.