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[Xen-devel] Questions about how to propagate a guest domain flag

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: [Xen-devel] Questions about how to propagate a guest domain flag
From: Dave McCracken <dcm@xxxxxxxx>
Date: Wed, 29 Apr 2009 11:03:09 -0500
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen Developers <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Now that I have guest domain creation/restore working with superpages, I need 
to actually add a flag in the domain config file to make it conditional.  I 
see where I can get it into the Python info object.  Now what's the best thing 
to do with it?

I can propagate it down to where the C library calls populate_physmap via 
function arguments.  Is there a better way for the low level C library to 
query up to the Python object?

I would really like to make this flag visible to the Linux kernel.  My method 
would be to somehow set it in the hypervisor where the kernel can query it.  
Where is a good place to put this flag in the hypervisor?  Is there a better 
way for the kernel to get it?

Dave McCracken
Oracle Corp.

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