Zachary Amsden wrote:
> Unless you also migrate the hypercall page itself and impose migration
> restrictions on compatible hypercall pages.
Seems unreasonable, especially if you support migration between VT and
SVM machines. The whole point of a hypercall page is to give you a
point of indirection in order to hide these kinds of hardware
differences; migrating it would defeat the purpose.
> Although I favor the guarantee that execution within the hypercall
> page is finished - it is important for protecting against
> non-reentrancy as well. Think about interrupts during batching /
> queueing operations.
Not quite sure that's specifically relevant to migration, but yes, its
important to disable interrupts while doing the setup for a batch of
stuff unless you want to see some surprises in your queue (and not "Oh,
yay, a puppy!" kind of surprises).
J
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
kvm-devel mailing list
kvm-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/kvm-devel
