privcmd_fault with WinXP

privcmd_fault with WinXP

[Michael David Crawford]

I'm getting a little better at figuring out problems on my own.

I'm using the 3.4.0 Xen kernel, but with the Linux git xen-tip/master 
sources.  Are they expected to be compatible?

I'll give xen-tip/next a try.

I really want to be able to run a recent Linux because it has a driver 
for my 3ware 9690SA RAID.  The 2.6.18 kernel doesn't.  I took a stab at 
backporting it, but haven't gotten my backport to actually work yet.

So far I can start a WinXP SP3 HVM DomU.  A window appears, turns grey, 
then disappears.  Each time I try this, dmesg shows a line like these:

   privcmd_fault: vma=ffff88008a971840 7fc99b128000-7fc99b228000, 
pgoff=0, uv=00007fc99b128000

   privcmd_fault: vma=ffff8800919f2c60 7f8e7162e000-7f8e7172e000, 
pgoff=0, uv=00007f8e7162e000

   privcmd_fault: vma=ffff88008a88a4d0 7ffe0da4e000-7ffe0db4e000, 
pgoff=0, uv=00007ffe0da4e000

If there's anything I could do to help debug this, just let me know.

There was a post about what I think is the same bug at:

http://lists.xensource.com/archives/html/xen-devel/2009-04/msg00104.html

That post includes a call trace - my dmesg doesn't have one.  My system 
doesn't crash - the DomU just exits but nothing else bad happens.

My box is a Core 2 Quad Xeon, e5420 or some such, 8 GB FB-DIMM, 
Supermicro X7DWA-N motherboard.

Hope This Helps!

Mike
-- 
Michael David Crawford
mdc@prgmr.com

    prgmr.com - We Don't Assume You Are Stupid.

       Xen-Powered Virtual Private Servers: http://prgmr.com/xen

Re: privcmd_fault with WinXP

[Michael David Crawford]

Michael David Crawford wrote:
> I'm using the 3.4.0 Xen kernel, but with the Linux git xen-tip/master 
> sources.  Are they expected to be compatible?

Sorry, I should have said that my xen-tip/master Linux is my Dom0. 
Other than not launching HVM DomUs it works just fine.  I haven't yet 
tried any paravirtualized DomUs.

Mike
-- 
Michael David Crawford
mdc@prgmr.com

    prgmr.com - We Don't Assume You Are Stupid.

       Xen-Powered Virtual Private Servers: http://prgmr.com/xen

Re: Re: privcmd_fault with WinXP

[William Pitcock]

On Fri, 2009-05-22 at 05:24 -0700, Michael David Crawford wrote:
> Michael David Crawford wrote:
> > I'm using the 3.4.0 Xen kernel, but with the Linux git xen-tip/master 
> > sources.  Are they expected to be compatible?
> 
> Sorry, I should have said that my xen-tip/master Linux is my Dom0. 
> Other than not launching HVM DomUs it works just fine.  I haven't yet 
> tried any paravirtualized DomUs.

The lack of working HVM is a known issue at the moment.  It is being
worked on.  Ian Campbell has patches for it in the
git://xenbits.xensource.com/people/ianc/linux-2.6.git repository, branch
for-jeremy/privcmd.

William

Re: Re: privcmd_fault with WinXP

[Michael David Crawford]

William Pitcock wrote:
> The lack of working HVM is a known issue at the moment.  It is being
> worked on.  Ian Campbell has patches for it in the
> git://xenbits.xensource.com/people/ianc/linux-2.6.git repository, branch
> for-jeremy/privcmd.

Hot Damn.

I got the xen-tip/next sources and am using the result as my Dom0.  It 
is from 2.6.30-r6; the xen-tip/master is rc3.

The WinXP SP3 installer booted right up!  Ian's work must have been 
merged into xen-tip/next already.

I'm at the "Welcome to Setup" screen right now.

I am so excited!  I have NEVER been so happy to run Windoze(TM).

I've been running the unstable Dom0 for two or three weeks now, and 
haven't had any trouble at all with Linux itself.

I'll try BeOS 5 Pro next.  That one's a bastard to virtualize.

Mike
-- 
Michael David Crawford
mdc@prgmr.com

    prgmr.com - We Don't Assume You Are Stupid.

       Xen-Powered Virtual Private Servers: http://prgmr.com/xen

Re: Re: privcmd_fault with WinXP

[Ian Campbell]

On Fri, 2009-05-22 at 09:30 -0400, William Pitcock wrote:
> On Fri, 2009-05-22 at 05:24 -0700, Michael David Crawford wrote:
> > Michael David Crawford wrote:
> > > I'm using the 3.4.0 Xen kernel, but with the Linux git xen-tip/master 
> > > sources.  Are they expected to be compatible?
> > 
> > Sorry, I should have said that my xen-tip/master Linux is my Dom0. 
> > Other than not launching HVM DomUs it works just fine.  I haven't yet 
> > tried any paravirtualized DomUs.
> 
> The lack of working HVM is a known issue at the moment.  It is being
> worked on.  Ian Campbell has patches for it in the
> git://xenbits.xensource.com/people/ianc/linux-2.6.git repository, branch
> for-jeremy/privcmd.

Those fixes are now in Jeremy's tree too, in the xen-tip/next branch.

Ian.