--_000_1051EFB4D3A1704680C38CCAAC5836D292F0290CWPTXMAIL2ptxaxw_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, Do you mean this sleep : # read() returns immediately (non-blocking) if no one is # listening on the other side of the virtio-serial port. # So in order not to be in a tight-loop and waste CPU # time, we just sleep for a while and hope someone will # be there when we will awake from our nap. time.sleep(1) Thx. Regards, J..P -----Message d'origine----- De : users-bounces@ovirt.org [mailto:users-bounces@ovirt.org] De la part de= users-request@ovirt.org Envoy=E9 : vendredi 15 janvier 2016 10:54 =C0 : users@ovirt.org Objet : Users Digest, Vol 52, Issue 87 Send Users mailing list submissions to users@ovirt.org<mailto:users@ovirt.org> To subscribe or unsubscribe via the World Wide Web, visit http://lists.ovirt.org/mailman/listinfo/users or, via email, send a message with subject or body 'help' to users-request@ovirt.org<mailto:users-request@ovirt.org> You can reach the person managing the list at users-owner@ovirt.org<mailto:users-owner@ovirt.org> When replying, please edit your Subject line so it is more specific than "R= e: Contents of Users digest..." Today's Topics: 1. Re: What's going on open channel devices when migrating the Guest ? (Vinzenz Feenstra) 2. Re: Scripting Guests migration , shutdown and reboot ( from ovirt) ? (Vinzenz Feenstra) ---------------------------------------------------------------------- Message: 1 Date: Fri, 15 Jan 2016 10:51:50 +0100 From: Vinzenz Feenstra <vfeenstr@redhat.com<mailto:vfeenstr@redhat.com>> To: Jean-Pierre Ribeauville <jpribeauville@axway.com<mailto:jpribeauville@a= xway.com>> Cc: "users@ovirt.org<mailto:users@ovirt.org>" <users@ovirt.org<mailto:users= @ovirt.org>> Subject: Re: [ovirt-users] What's going on open channel devices when migrating the Guest ? Message-ID: <90F5CE30-927A-48A3-AC82-97118A1325B4@redhat.com<mailto:90F5CE3= 0-927A-48A3-AC82-97118A1325B4@redhat.com>> Content-Type: text/plain; charset=3D"utf-8"

On Jan 15, 2016, at 10:08 AM, Jean-Pierre Ribeauville <jpribeauville@axwa= y.com<mailto:jpribeauville@axway.com>> wrote:

Hi,

I?m using a channel device between host and guest to exchange datas every= 20 seconds.

On the Guest size , there is an open /dev/virtio file on which we read continuously what?s sent by the host.

My question is the following : When migrating the Guest to another host , and the migrating back to the first one , the Guest software doesn?t receive anymore datas from the= host unless I restart the Guest software to re-open the /dev/virtio file.

Is there any way to detect in the Guest that migration has been done so w= e have to reopen the file ?

Well you can look how we do it in the ovirt-guest-agent. But we?re not reop= ening the unix domain socket - We?re basically on read failure just resched= uling the read - That causes no problems after migrations - it just continu= es Our python code for that is here: https://github.com/oVirt/ovirt-guest-agen= t/blob/master/ovirt-guest-agent/VirtIoChannel.py HTH

Any hint is welcome .

Thanks for help.

J.P. Ribeauville

P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4

jpribeauville@axway.com<mailto:jpribeauville@axway.com> <mailto:jpribeauv=

ille@axway.com>

http://www.axway.com <http://www.axway.com/>

P Pensez ? l?environnement avant d?imprimer.

_______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org> <mailto:Users@ovirt.org> http://lists.ovirt.org/mailman/listinfo/users <http://lists.ovirt.org/mailman/listinfo/users>