From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Liu, Changpeng" <changpeng.liu@intel.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"stefanha@redhat.com" <stefanha@redhat.com>,
"ldoktor@redhat.com" <ldoktor@redhat.com>
Subject: Re: [Qemu-devel] virtio-blk io bar size changed
Date: Mon, 11 Feb 2019 22:21:10 -0500 [thread overview]
Message-ID: <20190211222053-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <FF7FC980937D6342B9D289F5F3C7C2625B7B4E39@SHSMSX103.ccr.corp.intel.com>
On Tue, Feb 12, 2019 at 01:59:38AM +0000, Liu, Changpeng wrote:
>
>
> > -----Original Message-----
> > From: Michael S. Tsirkin [mailto:mst@redhat.com]
> > Sent: Tuesday, February 12, 2019 1:23 AM
> > To: Dr. David Alan Gilbert <dgilbert@redhat.com>
> > Cc: qemu-devel@nongnu.org; Liu, Changpeng <changpeng.liu@intel.com>;
> > stefanha@redhat.com; ldoktor@redhat.com
> > Subject: Re: virtio-blk io bar size changed
> >
> > 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 <changpeng.liu@intel.com>
> > > 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.
> Correct, after this commit the BAR config size is changed, I will submit a patch to fix this.
Thanks!
> >
> >
> > > --
> > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
prev parent reply other threads:[~2019-02-12 3:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 16:58 [Qemu-devel] virtio-blk io bar size changed Dr. David Alan Gilbert
2019-02-11 17:22 ` Michael S. Tsirkin
2019-02-12 1:59 ` Liu, Changpeng
2019-02-12 3:21 ` Michael S. Tsirkin [this message]
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