Am 13.11.2010 08:49, Stefan Hajnoczi wrote: > 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.
Ah, good. And what about the guest-triggerable qemu exit above? Jan
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