Re: [Xen-devel] (no subject)

[Francisco Rocha <f.e.liberal-rocha@xxxxxxxxxxxxxxx>]

________________________________________
From: Wei Huang [wei.huang2@xxxxxxx]
Sent: 06 April 2012 15:51
To: Francisco Rocha
Cc: Andrew Cooper; xen-devel@xxxxxxxxxxxxx
Subject: Re: [Xen-devel] (no subject)

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

-Wei

I didn't change the kernel, it's a fresh install.
I tried the latest for Fedora 16 and Xubuntu 11.10 both 
rebooted the machine.

Cheers,
Francisco

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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