Re: Revisiting the Xenoprof problem

[William Cohen <wcohen@redhat.com>]

Santos, Jose Renato G wrote:
> Running oprofile 0.9.3 still requires a patch to Xen http://xenoprof.sourceforge.net/xenoprof-oprofile-0.9.3-compat.patch
> The plan was to have this patch into mainline Xen once the oprofile patches to support Xen passive domains were accepted into Oprofile main tree
> It seems that this is not going to happen anytime soon as nobody is working on it.
> 
> I briefly discussed this with John Levon last week.
> We agreed to reserve a domain_switch code in Oprofile and thus avoid future incompatibilities while we don't have the proper passive domain support included.
> I will work on a patch for that.
> After that we should think on a plan to enable oprofile 0.9.3 in Xen without breaking instalations with oprofile 0.9.2 and 0.9.1.
> 
> Regards
> 
> Renato

So the xen passive domain support needs to be accepted into oprofile before the 
matching patches get accepted into Xen? Is there going to be a placeholder or 
some other entry in oprofile cvs, so people know that a define is reserved for 
Xenoprof in  daemon/opd_interface.h?

Any thoughts on how to determine whether the old or new xenoprof interface is 
being used. The oprofile kernel-user space interface doesn't have versioning 
information.

-Will