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Re: [Xen-devel] RE: Maturity of Xen PV drivers?

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] RE: Maturity of Xen PV drivers?
From: Jérôme Petazzoni <jp@xxxxxxxx>
Date: Tue, 27 Jan 2009 19:02:47 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Phuong Hoang <pnhoang75@xxxxxxxxx>
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Hi James,
  Do you know any company has used Xen PV drivers for Windows in their
production?  Or Is there any limitation for those drivers (list of know
 issues etc.)

I haven't had any issues in quite a while (12 months, various versions),
and I use them in production (the machines are well backed up of course.
In fact the only problems I have had under windows was when _not_ using
PV drivers - a Xen/Dom0 crash left one of my windows domains corrupt
because of the way Dom0 caches disk writes in the qemu drivers.

Same thing here - we have a Xen host (64 bits) running a couple of Windows 2003 VMs. Without the GPL PV drivers, heavy I/O caused almost-reproducible crashes (for instance, downloading a large file thru CIFS hung the Windows VM). With the GPL PV drivers, I/O is of course *a lot* faster and no crash has been seen yet.

HTH,

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