On Fri, Nov 12, 2010 at 10:02 PM, Jan Kiszka <jan.kis...@web.de> wrote: > Hi, > > both after hard and guest-initiated reset, something is seriously broken > with virtio block devices. If I reset my Linux guest while still in > grub, the bios will simply fail to read from the disk after the reboot. If I > reset after Linux touched the device, qemu terminates: > > Breakpoint 1, 0x00007ffff4b945b0 in _exit () from /lib64/libc.so.6 > (gdb) bt > #0 0x00007ffff4b945b0 in _exit () from /lib64/libc.so.6 > #1 0x00007ffff4b2948d in __run_exit_handlers () from /lib64/libc.so.6 > #2 0x00007ffff4b29535 in exit () from /lib64/libc.so.6 > #3 0x0000000000568da3 in virtqueue_num_heads (vq=0x17040e0, idx=0) at > /data/qemu/hw/virtio.c:258 > #4 0x0000000000569511 in virtqueue_pop (vq=0x17040e0, elem=0x17cea58) at > /data/qemu/hw/virtio.c:388 > #5 0x0000000000419e31 in virtio_blk_get_request (s=0x1704010) at > /data/qemu/hw/virtio-blk.c:132 > #6 virtio_blk_handle_output (vdev=0x1704010, vq=<value optimized out>) at > /data/qemu/hw/virtio-blk.c:369 > > This is with current qemu.git head, haven't tried older versions. Known bug?
This is a known issue. Gleb has posted a SeaBIOS fix: http://www.mail-archive.com/qemu-devel@nongnu.org/msg45849.html Currently the patch only appears in SeaBIOS master. Gleb and Kevin have discussed putting it into 0.6.1.2 stable (see linked thread). QEMU should then pick that release up. Stefan
