Re: [Xen-devel] (no subject)

[Wei Huang <wei.huang2@xxxxxxx>]

Then I think your Dom0 (i.e. kernel 3.x.x) has some problems with 
xsave/xrstor.
-Wei

On 04/06/2012 09:53 AM, Francisco Rocha wrote:
> ________________________________________
> From: Francisco Rocha
> Sent: 05 April 2012 21:43
> To: wei.huang2@xxxxxxx
> Cc: Andrew Cooper; xen-devel@xxxxxxxxxxxxx
> Subject: RE: [Xen-devel] (no subject)
>
> ________________________________________
> From: Wei Huang [wei.huang2@xxxxxxx]
> Sent: 05 April 2012 21:27
> To: Francisco Rocha
> Cc: Andrew Cooper; xen-devel@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] (no subject)
>
> On 04/05/2012 03:17 PM, Francisco Rocha wrote:
> > ________________________________________
> > From: Wei Huang [wei.huang2@xxxxxxx]
> > Sent: 05 April 2012 20:36
> > To: Francisco Rocha
> > Cc: Andrew Cooper; xen-devel@xxxxxxxxxxxxx
> > Subject: Re: [Xen-devel] (no subject)
> >
> > On 04/05/2012 01:26 PM, Francisco Rocha wrote:
> > > Date: Thu, 5 Apr 2012 18:44:14 +0100
> > > From: Andrew Cooper<andrew.cooper3@xxxxxxxxxx>
> > > To:<xen-devel@xxxxxxxxxxxxx>
> > > Subject: Re: [Xen-devel] lastest xen unstable crash
> > > Message-ID:<4F7DD9EE.3080404@xxxxxxxxxx>
> > > Content-Type: text/plain; charset="ISO-8859-1"
> > >
> > > On 05/04/12 18:37, Francisco Rocha wrote:
> > > > Hi everyone,
> > > >
> > > > I was trying to build a new machine but the system keeps rebooting.
> > > > I used the lasted unstable version from xen-unstable.hg.
> > > >
> > > > I have tried with Fedora 16 (kernel 3.3.0-8) and Xubuntu 11.10 
> > > > (3.0.0.17-generic).
> > > >
> > > > The output to my serial console is attached.
> > > >
> > > > Cheers,
> > > > Francisco
> > > What is your Linux command line? does it include "console=hvc0"?
> > > Perhaps some early_printk settings are required.
> > >
> > > Please include my email in your replies, thank you.
> > >
> > > Yes, it includes hvc0. I used your tutorial to setup the SOL.
> > >
> > > title        Xen 3.4.2 / pv_ops Linux dom0 2.6.31.6 with a serial console
> > > root         (hd0,0)
> > > kernel       /xen-3.4.gz dom0_mem=512M loglvl=all guest_loglvl=all sync_console 
> > > console_to_ring com1=115200,8n1,0xe000,0 console=com1
> > > module       /vmlinuz-2.6.31.6 ro root=/dev/vg00/lv01 console=hvc0 
> > > earlyprintk=xen nomodeset
> > > module       /initrd-2.6.31.6.img
> > >
> > > Something like this, I am not at the machine anymore.
> > >
> > > Francisco
> > It looks like xsave/xrstore instructions (xsetbv instruction in
> > xstate_enable() function to be exact) related. You can try to disable
> > xsave to to see if this helps.
> >
> > -Wei
> >
> > Sorry about the untitled message.
> >
> > Should I be the one disabling xsave or is that for Andrew to change something?
> > How can I do that?
> Xen-unstable supports xsave/xrstor. You are using kernel 3.x.x, which
> should support xsave/xrstor too. You can try to set xsave=0 in xen.gz
> line of grub entry and boot again. Something like this:
>
> kernel /boot/xen.gz blah blah xsave=0
> module blah blah
> blah
>
> Oh, i see, it's some new functionality. I will try it tomorrow and then let you 
> know how it goes.
>
> Thank you for the help.
>
> Francisco
>
> -Wei
>
> > Anyway, shouldn't Xen support it?
> >
> > cheers,
> > Francisco
> The xsave=0 command line parameter solves the problem.
>
> Thank you,
> Francisco


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