[PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Dan Magenheimer]

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We have found that virt-install fails to create a domain with 3.1-testing since the timer_mode patches went in.

This patch allows virt-install to run properly again.

Please apply prior to 3.1.3 release.  Though untested, it appears from source examination that the patch is also required on 3.2 and -unstable.

Dan

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diff -Naur a/tools/python/xen/xend/XendConfig.py b/tools/python/xen/xend/XendConfig.py
--- a/tools/python/xen/xend/XendConfig.py	2008-01-18 13:43:47.000000000 -0700
+++ b/tools/python/xen/xend/XendConfig.py	2008-01-18 13:35:21.000000000 -0700
@@ -319,6 +319,7 @@
             'shadow_memory': 0,
             'memory_static_max': 0,
             'memory_dynamic_max': 0,
+            'timer_mode': 0,
             'devices': {},
             'security': None,
             'on_xend_start': 'ignore',
diff -Naur a/tools/python/xen/xend/XendDomainInfo.py b/tools/python/xen/xend/XendDomainInfo.py
--- a/tools/python/xen/xend/XendDomainInfo.py	2008-01-18 13:43:27.000000000 -0700
+++ b/tools/python/xen/xend/XendDomainInfo.py	2008-01-18 13:37:01.000000000 -0700
@@ -1542,7 +1542,7 @@
         # Set timer configration of domain
         if hvm:
             xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
-                long(self.info["platform"].get("timer_mode")))
+                long(self.info['timer_mode']))
 
         # Set maximum number of vcpus in domain
         xc.domain_max_vcpus(self.domid, int(self.info['VCPUs_max']))

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Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Keir Fraser]

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What¹s virt-install? I¹ve been able to create domains no problem.

 -- Keir

On 18/1/08 21:22, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:

> We have found that virt-install fails to create a domain with 3.1-testing
> since the timer_mode patches went in.
> 
> This patch allows virt-install to run properly again.
>  
> Please apply prior to 3.1.3 release.  Though untested, it appears from source
> examination that the patch is also required on 3.2 and -unstable.
>  
> Dan
>  
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel



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RE: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Dan Magenheimer]

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Re: [Xen-devel] [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-installvirt-install is a tool on the Red Hat distribution and on Oracle VM that uses virtlib
and primarily through a management gui.  I'm no expert but it uses the XendServer
interface, which probably results in a slightly different sequence of calls when
creating a domain.

Without the (small) patch, virt-install fails whenever trying to create an hvm domain.

Perhaps Daniel or someone at RedHat can confirm? 

Thanks,
Dan

-----Original Message-----
From: Keir Fraser [mailto:Keir.Fraser@cl.cam.ac.uk]
Sent: Friday, January 18, 2008 2:29 PM
To: dan.magenheimer@oracle.com; xen-devel@lists.xensource.com
Subject: Re: [Xen-devel] [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install


  What's virt-install? I've been able to create domains no problem.

   -- Keir

  On 18/1/08 21:22, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:


    We have found that virt-install fails to create a domain with 3.1-testing since the timer_mode patches went in.

    This patch allows virt-install to run properly again.

    Please apply prior to 3.1.3 release.  Though untested, it appears from source examination that the patch is also required on 3.2 and -unstable.

    Dan



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Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Daniel P. Berrange]

On Fri, Jan 18, 2008 at 02:41:53PM -0700, Dan Magenheimer wrote:
> virt-install is a tool on the Red Hat distribution and on Oracle VM that uses virtlib
> and primarily through a management gui.  I'm no expert but it uses the XendServer
> interface, which probably results in a slightly different sequence of calls when
> creating a domain.
> 
> Without the (small) patch, virt-install fails whenever trying to create an hvm domain.
> 
> Perhaps Daniel or someone at RedHat can confirm? 

I've not seen any problems on Xen 3.2 release with creating domains, but have
not had any time to test the 3.1-testing tree since the 3.1.2 release came out
so can't confirm that yet. I'll try and reproduce it - what error were you getting
when trying to create a VM ?  libvirt doesn't specify any timer_mode parameter
when creating VMs, so it should use whatever XenD's default is for that.

Dan.
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Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Keir Fraser]

On 18/1/08 21:59, "Daniel P. Berrange" <berrange@redhat.com> wrote:

> I've not seen any problems on Xen 3.2 release with creating domains, but have
> not had any time to test the 3.1-testing tree since the 3.1.2 release came out
> so can't confirm that yet. I'll try and reproduce it - what error were you
> getting
> when trying to create a VM ?  libvirt doesn't specify any timer_mode parameter
> when creating VMs, so it should use whatever XenD's default is for that.

In Dan's patch, I don't know about the change to XendConfig.py, but the
change from ['platform'].get('timer_mode') to ['timer_mode'] doesn't look
very likely. All other HVM config parameters handed down from xm create end
up in the 'platform' dict.

Is the change to XendConfig.py to specify a default for timer_mode actually
ending up putting that default value in the wrong place: in the vmconfig as
a first-class entry in its own right, rather than as a sub-key of
'platform'?

If the problem is lack of a default value for timer_mode in some cases, I'd
rather fix XendDomainInfo.py to handle non-existent timer_mode key.

 -- Keir

RE: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Dan Magenheimer]

> so can't confirm that yet. I'll try and reproduce it - what 
> error were you getting
> when trying to create a VM ?  libvirt doesn't specify any 
> timer_mode parameter
> when creating VMs, so it should use whatever XenD's default 
> is for that.

Traceback below.

Yeah, I'm no parseltongue but I think the default wasn't
specified properly.

Note also that I am using python-virtinst-0.99 so maybe
the interface to the XendServer has changed in more recent
releases and wouldn't provoke the problem?

Dan


Starting install...
libvir: Xen Daemon error : GET operation failed:
libvir: Xen Daemon error : POST operation failed: (xend.err 'Error creating doma
in: long() argument must be a string or a number')
Failed to create domain foo
Traceback (most recent call last):
  File "/usr/sbin/virt-install", line 476, in ?
    main()
  File "/usr/sbin/virt-install", line 440, in main
    dom = guest.start_install(conscb)
  File "/usr/lib/python2.4/site-packages/virtinst/XenGuest.py", line 382, in sta
rt_install
    self.domain = self.conn.createLinux(cxml, 0)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 249, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed')
libvirt.libvirtError: virDomainCreateLinux() failed

Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Keir Fraser]

On 18/1/08 22:13, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:

> Traceback below.
> 
> Yeah, I'm no parseltongue but I think the default wasn't
> specified properly.
> 
> Note also that I am using python-virtinst-0.99 so maybe
> the interface to the XendServer has changed in more recent
> releases and wouldn't provoke the problem?

Yes. I'll commit a fix for it.

 -- Keir

Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Daniel P. Berrange]

On Fri, Jan 18, 2008 at 03:13:16PM -0700, Dan Magenheimer wrote:
> > so can't confirm that yet. I'll try and reproduce it - what 
> > error were you getting
> > when trying to create a VM ?  libvirt doesn't specify any 
> > timer_mode parameter
> > when creating VMs, so it should use whatever XenD's default 
> > is for that.
> 
> Traceback below.
> 
> Yeah, I'm no parseltongue but I think the default wasn't
> specified properly.
> 
> Note also that I am using python-virtinst-0.99 so maybe
> the interface to the XendServer has changed in more recent
> releases and wouldn't provoke the problem?
> 
> Dan
> 
> 
> Starting install...
> libvir: Xen Daemon error : GET operation failed:
> libvir: Xen Daemon error : POST operation failed: (xend.err 'Error creating doma
> in: long() argument must be a string or a number')

Ok this is useful. I'd say that message comes from this:

             xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
                  long(self.info["platform"].get("timer_mode")))


And that 'self.info["platform"].get("timer_mode")' is returning None,
causing the long() cal to fail. 

So either we need to make sure that 'platform' gets a default value
set for 'timer_mode', or make the hvm_set_param() call conditional
like

   if self.info["platform"].get("timer_mode") is not None:
       xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
                  long(self.info["platform"].get("timer_mode")))

I assume the Hypervisor itself already has a default timemode value,
so making this set_param conditional is probably easiest.

Dan.
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
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RE: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Dan Magenheimer]

> So either we need to make sure that 'platform' gets a default value
> set for 'timer_mode', or make the hvm_set_param() call conditional
> like
> 
>    if self.info["platform"].get("timer_mode") is not None:
>        xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
>                   long(self.info["platform"].get("timer_mode")))
> 
> I assume the Hypervisor itself already has a default timemode value,
> so making this set_param conditional is probably easiest.

Yes, this is much nicer.

Thanks,
Dan

Re: [PATCH] 3.1.3 (and ??) timer_mode fix in xend for virt-install

[Daniel P. Berrange]

On Fri, Jan 18, 2008 at 09:59:27PM +0000, Daniel P. Berrange wrote:
> On Fri, Jan 18, 2008 at 02:41:53PM -0700, Dan Magenheimer wrote:
> > virt-install is a tool on the Red Hat distribution and on Oracle VM that uses virtlib
> > and primarily through a management gui.  I'm no expert but it uses the XendServer
> > interface, which probably results in a slightly different sequence of calls when
> > creating a domain.
> > 
> > Without the (small) patch, virt-install fails whenever trying to create an hvm domain.
> > 
> > Perhaps Daniel or someone at RedHat can confirm? 
> 
> I've not seen any problems on Xen 3.2 release with creating domains, but have
> not had any time to test the 3.1-testing tree since the 3.1.2 release came out
> so can't confirm that yet. I'll try and reproduce it - what error were you getting
> when trying to create a VM ?  libvirt doesn't specify any timer_mode parameter
> when creating VMs, so it should use whatever XenD's default is for that.

Just re-tested and I can confirm the problem *does* impact Xen 3.2 as well.

Dan
-- 
|=- Red Hat, Engineering, Emerging Technologies, Boston.  +1 978 392 2496 -=|
|=-           Perl modules: http://search.cpan.org/~danberr/              -=|
|=-               Projects: http://freshmeat.net/~danielpb/               -=|
|=-  GnuPG: 7D3B9505   F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505  -=|