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Date: Wed, 18 Jun 2014 15:35:21 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] vhost-user: migration?
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To: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Cc: Igor Mammedov <imammedo@redhat.com>, qemu-devel <qemu-devel@nongnu.org>, Antonios Motakis <a.motakis@virtualopensystems.com>

On Wed, Jun 18, 2014 at 02:41:15PM +0300, Nikolay Nikolaev wrote:
>=20
>=20
>=20
> On Wed, Jun 18, 2014 at 2:29 PM, Michael S. Tsirkin <mst@redhat.com> wr=
ote:
>=20
>     On Wed, Jun 18, 2014 at 02:24:32PM +0300, Nikolay Nikolaev wrote:
>     > Hello,
>     >
>     > On Wed, Jun 18, 2014 at 12:33 PM, Michael S. Tsirkin <mst@redhat.=
com>
>     wrote:
>     >
>     > =A0 =A0 Just a query whether migration works for you
>     > =A0 =A0 guys with vhost-user and snabbswitch.
>     >
>     >
>     > I am not aware of anyone ever did such tests.
>     >
>     >
>     > =A0 =A0 vhost user code seems to have enough hooks in
>     > =A0 =A0 place to make it work, but was it tested
>     > =A0 =A0 in practice?
>     >
>     >
>     >
>     > Can you give some pointers of a simple/quick test scenario. Maybe=
 we'll
>     be able
>     > to set it up.
>=20
>=20
>     Basically migrate while doing networking :)
>=20
>     Does your vhost server have code to set bits in the memory log
>     when logging is enabled?
>=20
>=20
> No - we didn't implement this feature.

Interesting. In that case vhost user should for now
block migration.
You must also check log feature and return failure.


>=20
>     The log address is supplied to VHOST_SET_LOG_BASE and log_guest_add=
r.
>=20
>=20
>     >
>     >
>     > =A0 =A0 --
>     > =A0 =A0 MST
>     >
>     >
>     > regards,
>     > Nikolay Nikolaev
>=20
>=20
> regards,
> Nikolay Nikolaev