Re: [Qemu-devel] [PATCH 0/4] Tweaks around virtio-blk start/stop

[Paolo Bonzini]

On 16/03/2016 12:24, Christian Borntraeger wrote:
> On 03/16/2016 12:09 PM, Paolo Bonzini wrote:
>> On 16/03/2016 11:49, Christian Borntraeger wrote:
>>> #3  0x00000000800b713e in virtio_blk_data_plane_start (s=0xba232d80) at 
>>> /home/cborntra/REPOS/qemu/hw/block/dataplane/virtio-blk.c:224
>>> #4  0x00000000800b4ea0 in virtio_blk_handle_output (vdev=0xb9eee7e8, 
>>> vq=0xba305270) at /home/cborntra/REPOS/qemu/hw/block/virtio-blk.c:590
>>> #5  0x00000000800ef3dc in virtio_queue_notify_vq (vq=0xba305270) at 
>>> /home/cborntra/REPOS/qemu/hw/virtio/virtio.c:1095
>>> #6  0x00000000800f1c9c in virtio_queue_host_notifier_read (n=0xba3052c8) at 
>>> /home/cborntra/REPOS/qemu/hw/virtio/virtio.c:1785

If you just remove the calls to virtio_queue_host_notifier_read, here
and in virtio_queue_aio_set_host_notifier_fd_handler, does it work
(keeping patches 2-4 in)?

Paolo

>>> #7  0x00000000800f1e14 in virtio_queue_set_host_notifier_fd_handler 
>>> (vq=0xba305270, assign=false, set_handler=false) at 
>>> /home/cborntra/REPOS/qemu/hw/virtio/virtio.c:1817
>>> #8  0x0000000080109c50 in virtio_ccw_set_guest2host_notifier 
>>> (dev=0xb9eed6a0, n=0, assign=false, set_handler=false) at 
>>> /home/cborntra/REPOS/qemu/hw/s390x/virtio-ccw.c:97
>>> #9  0x0000000080109ef2 in virtio_ccw_stop_ioeventfd (dev=0xb9eed6a0) at 
>>> /home/cborntra/REPOS/qemu/hw/s390x/virtio-ccw.c:154