From: "Michael S. Tsirkin" <mst@redhat.com>
To: Thibaut Collet <thibaut.collet@6wind.com>
Cc: Jason Wang <jasowang@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v3 2/2] vhost user: Add RARP injection for legacy guest
Date: Mon, 15 Jun 2015 14:45:32 +0200 [thread overview]
Message-ID: <20150615141349-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <CABUUfwPoemh46Arv7BzarKuTuaK5KdpvqinHnkv7AgCHn-Ucsg@mail.gmail.com>
On Mon, Jun 15, 2015 at 02:12:40PM +0200, Thibaut Collet wrote:
> After a resume operation the guest always kicks the backend for each
> virtual queues.
> A live migration does a suspend operation on the old host and a resume
> operation on the new host. So the backend has a kick after migration.
>
> I have checked this point with a legacy guest (redhat 6-5 with kernel
> version 2.6.32-431.29.2) and the kick occurs after migration or
> resume.
>
> Jason have you an example of legacy guest that will not kick the
> virtual queue after a resume ?
In practice with sufficiently modern guests you can look
at DRIVER_OK status bit. Process rings if that bit is set.
--
MST
next prev parent reply other threads:[~2015-06-15 12:45 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-10 13:43 [Qemu-devel] [PATCH v3 0/2] Add live migration for vhost user Thibaut Collet
2015-06-10 13:43 ` [Qemu-devel] [PATCH v3 1/2] vhost user: add support of live migration Thibaut Collet
2015-06-10 13:52 ` Michael S. Tsirkin
2015-06-10 14:22 ` Thibaut Collet
2015-06-10 14:27 ` Michael S. Tsirkin
2015-06-10 15:24 ` Thibaut Collet
2015-06-10 15:34 ` Stefan Hajnoczi
2015-06-23 6:01 ` Michael S. Tsirkin
2015-06-10 13:43 ` [Qemu-devel] [PATCH v3 2/2] vhost user: Add RARP injection for legacy guest Thibaut Collet
2015-06-10 15:34 ` Michael S. Tsirkin
2015-06-10 15:48 ` Thibaut Collet
2015-06-10 16:00 ` Michael S. Tsirkin
2015-06-10 20:25 ` Thibaut Collet
2015-06-10 20:50 ` Michael S. Tsirkin
2015-06-11 5:34 ` Thibaut Collet
2015-06-11 5:39 ` Jason Wang
2015-06-11 5:49 ` Thibaut Collet
2015-06-11 5:54 ` Jason Wang
2015-06-11 10:38 ` Michael S. Tsirkin
2015-06-11 12:10 ` Thibaut Collet
2015-06-11 12:13 ` Michael S. Tsirkin
2015-06-11 12:33 ` Thibaut Collet
2015-06-12 7:55 ` Jason Wang
2015-06-12 11:53 ` Thibaut Collet
2015-06-12 14:28 ` Michael S. Tsirkin
2015-06-15 7:43 ` Jason Wang
2015-06-15 8:44 ` Michael S. Tsirkin
2015-06-15 12:12 ` Thibaut Collet
2015-06-15 12:45 ` Michael S. Tsirkin [this message]
2015-06-15 13:04 ` Thibaut Collet
2015-06-16 5:29 ` Jason Wang
2015-06-16 7:24 ` Thibaut Collet
2015-06-16 8:05 ` Jason Wang
2015-06-16 8:16 ` Thibaut Collet
2015-06-17 4:16 ` Jason Wang
2015-06-17 6:42 ` Michael S. Tsirkin
2015-06-17 7:05 ` Thibaut Collet
2015-06-18 15:16 ` Thibaut Collet
2015-06-23 2:12 ` Jason Wang
2015-06-23 5:49 ` Michael S. Tsirkin
2015-06-24 8:31 ` Jason Wang
2015-06-24 11:05 ` Michael S. Tsirkin
2015-06-25 9:59 ` Jason Wang
2015-06-25 11:01 ` Thibaut Collet
2015-06-25 12:53 ` Michael S. Tsirkin
2015-06-25 14:22 ` Thibaut Collet
2015-06-26 4:06 ` Jason Wang
2015-06-16 3:35 ` Jason Wang
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