<html><head><style type='text/css'>body { font-family: 'Arial'; font-size: 10pt; color: #000000}</style></head><body><style>body { font-family: 'Arial'; font-size: 10pt; color: #000000}</style><div>On Thursday 08 February 2007 10:08am, Jim Klein wrote:
<br>> Anyone been able to get the PV drivers from Xensource to work on an
<br>> FC6 created HVM. Performance is rather sluggish, even on 64bit,
<br>> without these, yet they don't seem to want to work here. Or,
<br>> alternatively, is Red Hat working on their own? The HVM IO is really
<br>> a bit too slow for most production use without them.
<br>
<br><br>On Thu, 8 Feb 2007 11:26am, Lamont Peterson wrote:<br>>I don't believe that you can do this.
<br>
><br>>But, I'm wondering what OS you're trying to run on the HVM DomU. If it's
<br>>Linux, use a paravirtualized DomU. You'll get much better performance
<br>>(especially on things like I/O).
<br>
><br>>HVM adds some emulation overhead and, thus, is slower than PV. HVM is only
<br>>necessary to run an OS for which no paravirtualized kernel is available.
<br>>--
<br>>Lamont Peterson <lamont@gurulabs.com>
<br>>Senior Instructor
<br>>Guru Labs, L.C. [ http://www.GuruLabs.com/ ]
<br>
<br>All my Linux guests are PV (been running Xen in production for 7 months - far longer in testing.) I'm talking about Windows guests, which is why I would need PV drivers to work. Am running 64bit Dom0 to alleviate some of the pain, but I/O is still too slow for anything but lightweight applications. We're a RHEL shop, so would prefer to use RHEL as a base over XenSource Commercial, but it looks like I may have to go that route if noone else is working on PV drivers for Windows guests.<br><br>-- <br>Jim Klein<br>Director Information Services & Technology<br>LPIC1, CNA/CNE 4-6, RHCT/RHCE<br>Saugus Union School District<br>http://www.saugus.k12.ca.us <br><br>"Finis Origine Pendet"<br><br></div></body></html>