From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: vif backend configuration times out
Date: Tue, 7 Aug 2012 06:42:13 +0100
Message-ID: <1344318133.24794.16.camel@dagon.hellion.org.uk>
References: <20120806173905.GA26336@aepfle.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <20120806173905.GA26336@aepfle.de>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Olaf Hering <olaf@aepfle.de>
Cc: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
List-Id: xen-devel@lists.xenproject.org

On Mon, 2012-08-06 at 18:39 +0100, Olaf Hering wrote:
> With current xen-unstable 25733:353bc0801b11 the attached hvm.cfg does
> not start anymore with a SLES11SP2 dom0 kernel, but it starts if I run a
> 3.5 pvops dom0 kernel. I have no modifications other than the stubdom -j
> patch.
> 
> The output from this command is attached:
> xl -vvvv create -d -f /root/xenpaging/sles11sp2_full_xenpaging_local.cfg 2>&1 | tee xl-create-`uname -r`.txt &
> 
> Any ideas how to fix this timeout error?

The tools are waiting for the backend to move from state 1
(XenbusStateInitialising) to state 2 (XenbusStateInitWait). A backend
driver typically makes that transition at the end of its probe function
-- what is the SLES11SP2 netback waiting for? Or is it failing to init,
in which case perhaps there is an error node in XS?

> 
> Olaf
> 
> ...
> libxl: debug: libxl_event.c:457:watchfd_callback: watch w=0x62bf88 wpath=/local/domain/0/backend/vif/2/0/state token=3/1: event epath=/local/domain/0/backend/vif/2/0/state
> libxl: debug: libxl_event.c:600:devstate_watch_callback: backend /local/domain/0/backend/vif/2/0/state wanted state 2 still waiting state 1
> libxl: debug: libxl_event.c:614:devstate_timeout: backend /local/domain/0/backend/vif/2/0/state wanted state 2  timed out
> libxl: debug: libxl_event.c:549:libxl__ev_xswatch_deregister: watch w=0x62bf88 wpath=/local/domain/0/backend/vif/2/0/state token=3/1: deregister slotnum=3
> libxl: debug: libxl_event.c:561:libxl__ev_xswatch_deregister: watch w=0x62bf88: deregister unregistered
> libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect device with path /local/domain/0/backend/vif/2/0
> libxl: error: libxl_create.c:1070:domcreate_attach_pci: unable to add nic devices
> ...