WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: [Xen-Users] System reboots after "Scrubbing free RAM" Xe

To: Joaquin Fernandez Piqueras <jfernandez@xxxxxxxxxxx>
Subject: [Xen-devel] Re: [Xen-Users] System reboots after "Scrubbing free RAM" Xen 4.0.1 linux 2.6.37-rc3, crash with less than 16 GB of dom0_mem
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Thu, 25 Nov 2010 10:13:46 +0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Thu, 25 Nov 2010 00:14:54 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4CEE18F3.3040403@xxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <op.vmo6xhz7sgl1jf@xxxxxxxxxxxxxxxxxxxxxx> <4CEE18F3.3040403@xxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.18 (2008-05-17)
On Thu, Nov 25, 2010 at 09:06:11AM +0100, Joaquin Fernandez Piqueras wrote:
>
> Al 25/11/10 00:16, En/na Marek Kaszycki ha escrit:
>> Hi Everyone
>>
>> I have sorted out the initial issues I've had and decided to give Xen  
>> another go.
>>
>> I'm trying to run Xen using kernel 2.6.37-rc3 (previous attempt with  
>> rc1 failed, and when I gave it a second go, rc3 was already out).
>>
>> As previously, 2.6.37-rc3 boots fine natively. 2.6.32 boots natively  
>> and under Xen as dom0, but I have reservations against running 2.6.32,  
>> please bear with me.
>> Booting 2.6.37-rc3 under Xen (4.0.1-1, squeeze) causes a reboot right  
>> after "Scrubbing free RAM" appears -- I believe some tables appear  
>> just to blink on the screen right afterwards, but I am unable to  
>> confirm just what exactly is there -- I don't have a serial console  
>> attached -- so I am unable to capture the output from Xen or dom0.
>>
>> I am at a loss as to what causes this. I have compiled the kernel  
>> myself, following the advice on  
>> http://wiki.xen.org/xenwiki/XenParavirtOps
>>
>> Since there are additional lines after the error message, I believe  
>> the hypervisor completes its init and the reboot happens just when the  
>> hypervisor wants to boot dom0.
>>
>> I have checked the threads:
>> http://lists.xensource.com/archives/html/xen-users/2010-11/msg00420.html
>> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg01227.html
>> My system has just 8 GB of RAM and just one CPU. Following the advice,  
>> I have added 'noreboot' to Xen entry in grub.cfg, but even though Xen  
>> doesn't reboot the system now, it's worse because right after  
>> "Scrubbing free RAM", the screen goes blank, no cursor or anything,  
>> and just stays this way.
>>
>> I have uploaded the grub.cfg and kernel .config to the following  
>> locations:
>> http://www.kaszycki.pl/xen/grub.cfg
>> http://www.kaszycki.pl/xen/kconfig
>>
>> Thanks in advance for all your help.
>>
>
> Hi,
>
> I have the same issue with a server with 32GB of RAM. In my case the  
> system reboots after "Scrubbing free RAM" when the dom0_mem parameter is  
> 16GB or less. I don't know if my problem is related , but I  
> workarrounded it setting dom0_mem=17GB and when the system boots I  
> decrease this value to 2GB with the "xm mem-set" command.
>
> It's not the best solution, but really I don't know how to get the  
> "dom0_mem=2GB" work.
>

This sounds like a bug.
What dom0 kernel version were you running?
Can you post the serial log about the crash?

I added xen-devel as CC.

-- Pasi


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>