On Tue, Jan 12, 2010 at 07:09:27PM +0100, Christoph Hellwig wrote: > This patch causes 100% reproducible boot panics in a Linux guest using > virtio. > > My qemu command line is: > > /opt/qemu/bin/qemu-system-x86_64 \ > -m 1500 \ > -enable-kvm \ > -drive > file=/dev/vg00/qemu-root,if=virtio,media=disk,cache=none,aio=threads \ > -kernel arch/x86/boot/bzImage \ > -append "root=/dev/vda console=tty0 console=ttyS0,38400n8" \ > -nographic > > and the guest dmesg is:
So the issue is that wrong block size (0xffffffff) was passed to guest. Would it make sense to add some sanity checking in virtio-blk to make it not crash but fail in probe? Which block size values are sane? -- MST
