From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Valzcig <gvalzcig@gmail.com>
Subject: domU to dom0 switch question
Date: Fri, 2 Apr 2010 19:02:09 -0400
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Hi,
I have two questions on between a switch one dom to another dom in Xen. I
hope this is the right forum to ask these questions ...

1) other than I / O, there is no reason to switch from one domU to dom0
(memory page remapping etc)? If I have a 1 CPU in my physical machine and I
run a domU with while loop that does nothing but use CPU, there is no reason
to switch to dom0?
2) In Xen PV is the hyper call entry page in the address space of the domU -
so call to a mapped hyper call not cause context switch - yes?

(Sorry for English not my language)
Thanks.

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Hi,<br>I have two questions on between a switch one dom to another dom in X=
en. I hope this is the right forum to ask these questions ...<br><br>1) oth=
er than I / O, there is no reason to switch from one domU to dom0 (memory p=
age remapping etc)? If I have a 1 CPU in my physical machine and I run a do=
mU with while loop that does nothing but use CPU, there is no reason to swi=
tch to dom0?<br>
2) In Xen PV is the hyper call entry page in the address space of the domU =
- so call to a mapped hyper call not cause context switch - yes?<br><br>(So=
rry for English not my language)<br>Thanks.<br><br><br>

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