Re: [Qemu-devel] nbd: Possible regression in 2.9 RCs

[Kevin Wolf]

Am 04.04.2017 um 15:27 hat Peter Krempa geschrieben:
> On Tue, Apr 04, 2017 at 15:19:02 +0200, Kevin Wolf wrote:
> > Am 03.04.2017 um 14:51 hat Peter Krempa geschrieben:
> > > On Mon, Apr 03, 2017 at 10:15:42 +0200, Kevin Wolf wrote:
> > > > Am 31.03.2017 um 19:43 hat Max Reitz geschrieben:
> > > > > On 31.03.2017 18:03, Ciprian Barbu wrote:
> 
> [...]
> 
> > > > Peter, Eric, what is the status on the libvirt side here?
> > > 
> > > Libvirt currently uses the NBD server only for non-shared storage
> > > migration. At that point the disk is not shared (while qemu may think
> > > so) since the other side is not actually running until the mirror
> > > reaches synchronized state.
> > 
> > Yes, I misunderstood the situation at first.
> > 
> > Anyway, is there already a libvirt patch for the cases where the image
> > is actually shared?
> 
> As said, we use the nbd server only for migration. There's no other
> usage I know of and thus no patch.

I mean two VMs sharing the same image file, and both expose it as a
guest device. The situation for which we discussed before that libvirt
needs to pass share-rw=on. I understand that this isn't related to this
report, but I want to make sure that it's not forgotten.

Kevin

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