Xen users - Aug 2010 - Question regarding Hypervisor_sched_op function

Hi,

I am trying to understand Hypervisor_sched_op function and I have few
question regarding this -

1. I understand that a guest VM can use the above function with
"yield", in
order to relinquish CPU time to other guests with running tasks.

a) So when the guest VM makes this call does it save/persist any scheduling
information about its current processes like runqueue, process state -
runnable, ready etc ? If it does can someone point to the code I can look
at.

c) When yielded guest VM is scheduled back by the hypervisor, does it uses
the previous state of the processes which were yielded ?

2. Is there a way in which the Hypervisor_sched_op call can be made from
hypervisor itself or Dom0 if required ?

Thanks
Mahendra


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Xen-devel@lists.xensource.com
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Hi,

I am trying to understand Hypervisor_sched_op function and I have few
question regarding this -

1. I understand that a guest VM can use the above function with
"yield", in
order to relinquish CPU time to other guests with running tasks.

a) So when the guest VM makes this call does it save/persist any scheduling
information about its current processes like runqueue, process state -
runnable, ready etc ? If it does can someone point to the code I can look
at.

c) When yielded guest VM is scheduled back by the hypervisor, does it uses
the previous state of the processes which were yielded ?

2. Is there a way in which the Hypervisor_sched_op call can be made from
hypervisor itself or Dom0 if required ?

Thanks
Mahendra


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users