Re: [Xen-devel] (no subject)

[Wei Huang <wei.huang2@xxxxxxx>]

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

-Wei

> Anyway, shouldn't Xen support it?
>
> cheers,
> Francisco


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