[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH 4/4] xen-blkback: support dynamic unbind/bind

On Thu, Dec 05, 2019 at 02:01:23PM +0000, Paul Durrant wrote:
> By simply re-attaching to shared rings during connect_ring() rather than
> assuming they are freshly allocated (i.e assuming the counters are zero)
> it is possible for vbd instances to be unbound and re-bound from and to
> (respectively) a running guest.
> This has been tested by running:
> while true; do dd if=/dev/urandom of=test.img bs=1M count=1024; done
> in a PV guest whilst running:
> while true;
>   do echo vbd-$DOMID-$VBD >unbind;
>   echo unbound;
>   sleep 5;
>   echo vbd-$DOMID-$VBD >bind;
>   echo bound;
>   sleep 3;
>   done

So this does unbind blkback while leaving the PV interface as

Thanks, Roger.

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.