I doubt you would be able to change it from the domU so I believe this is
expected behaviour. Changing the latency equates to writing the the pci
control registers, something that is definitely not allowed from a domU.
Even if that was not the case, it would be possible for a domU to affect
performance and reliability of the overall system if it could do so.
-----Original Message-----
From: xen-users-bounces@lists.xensource.com
[mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Ben Holt
Sent: April 10, 2008 2:36 PM
To: xen-users@lists.xensource.com
Subject: [Xen-users] Set PCI device latency from domU?
If a PCI device has been passed to a domU is it possible to set its
latency from the domU or does it have to be done from the domO?
When I attempt to set a devices latency from the domU with setpci I do
not receive an error message back indicating a problem, however the
latency as viewed with lspci -v is not changed. The same setpci
command from the dom0 successfully changes the latency and the change
is shown with lspci -v on both dom0 and the domU to which the device
has been passed.
- Ben
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users
_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users