Re: [Xen-devel] [patch] align periodic vtds only if hypervisor support is present

[Simon Horman <horms@xxxxxxxxxxxx>]

Allow xend to work with hypervisors that don't support alignment of
periodic vtds.

I'm not sure if there is any interest in this, but it allows older (pre
20109:d9480422034b "hvm: Align periodic vpts") hypervisors when used with
newer (>= 20109) xend.

Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>

--- 

There was some noise in the previous patch I posted, apologies for that.

Index: xen-unstable.hg/tools/python/xen/xend/XendDomainInfo.py
===================================================================
--- xen-unstable.hg.orig/tools/python/xen/xend/XendDomainInfo.py        
2009-02-20 10:18:41.000000000 +1100
+++ xen-unstable.hg/tools/python/xen/xend/XendDomainInfo.py     2009-02-20 
10:21:13.000000000 +1100
@@ -2247,8 +2247,10 @@ class XendDomainInfo:
         # Optionally enable periodic vpt aligning
         vpt_align = self.info["platform"].get("vpt_align")
         if hvm and vpt_align is not None:
-            xc.hvm_set_param(self.domid, HVM_PARAM_VPT_ALIGN,
-                             long(vpt_align))
+           try:
+                xc.hvm_set_param(self.domid, HVM_PARAM_VPT_ALIGN, vpt_align_l)
+            except Exception, e:
+               log.warn('Hypervisor does not support HVM_PARAM_VPT_ALIGN\n')
 
         # Set maximum number of vcpus in domain
         xc.domain_max_vcpus(self.domid, int(self.info['VCPUs_max']))

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