Re: [Libvir] [PATCH] Add Xen Scheduler APIs to xenDaemonDriver
Hello,
Thanks for applying the first patch (about adding read-only connections).
http://git.et.redhat.com/?p=libvirt.git;a=commit;h=4faeb0d567976377b2661f...
How about the second one ? We can make some improvements for virsh
schedinfo command with the patch, so I want the patch to be committed
if it is OK.
Regards,
Saori Fukuta
---
On Thu, 13 Mar 2008 17:30:57 +0900 Saori Fukuta wrote:
Hi,
I add the Xen Scheduler APIs to xenDaemonDriver.
- xenDaemonGetSchedulerType
- xenDaemonGetSchedulerParameters
- xenDaemonSetSchedulerParameters
We will have the following improvements by this patch:
1) xenDaemonDriver of Schedulr is usable
when xenHypervisorDriver failed.
2) Show the Scheduler information with non-root user.
3) Set the Scheduler parameters for inactive domain.
(Unfortunately not right now, because we need this fix.
http://lists.xensource.com/archives/html/xen-devel/2008-03/msg00301.html)
And I have a few things to note:
- Currently, implemented for the Xen-credit scheduler only.
- xenDaemonGetSchedulerType is supported in xendConfigVersion >= 4,
because we can get "xen_scheduler" from xend after Cset13394 of
Xen (i.e. xendConfigVersion is four or later).
- For the above reason, xenDaemonGetSchedulerParameters and
xenDaemonSetSchedulerParameters are also supported in
xendConfigVersion >= 4, because they are using xenDaemonGetSchedulerType
to get the scheduler type.
- At xenDaemonSetSchedulerParameters, there are restrictions
which depends on Xend-version.
a) We cannot set the "cap" value by xend before Cset15476 of Xen,
because xend does not support the "cap" value
at xend/server/SrvDomain.py
b) We cannot set the scheduler parameters for inactive domain
without the following patch.
http://lists.xensource.com/archives/html/xen-devel/2008-03/msg00301.html
If the above patch is committed, this API will be available
for inactive domain.
Regards,
Saori Fukuta