Re: [Qemu-devel] virtio-blk io bar size changed

[Michael S. Tsirkin]

On Mon, Feb 11, 2019 at 04:58:19PM +0000, Dr. David Alan Gilbert wrote:
> Hi,
>   Lukáš reported that there's a migration breakage between 3.1 and
> current head with virtio-blk;   it looks like the io bar changes from 64
> to 128 bytes and my bisect suggests it's:
> 
> commit caa1ee43131c060347b32893abd41fe4865eaa2e (HEAD, refs/bisect/bad)
> Author: Changpeng Liu <address@hidden>
> Date:   Wed Jan 16 13:19:30 2019 +0800
> 
>     vhost-user-blk: add discard/write zeroes features support
> 
> 
> How do we fix that?
> 
> Dave

Quickly :)

See the logic around virtio_net_set_config_size
and static VirtIOFeature feature_sizes - we need to
add something similar to virtio blk now.


> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK