Re: [Xen-API] xcp 1.1, linux 3.2 domu , and barrier issue

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, May 29, 2012 at 05:27:43PM +0000, Joseph Hom wrote:
> We use barrier=0 for Ubuntu 12.04 for the last few weeks and haven't seen an 
> issue with it. Other than the ability to reboot and have the system come up 
> reliably.

Yes, but obviously the issue should be fixed in XCP dom0 kernel instead, so you 
don't need any workaround in the VMs.

-- Pasi

> 
> -----Original Message-----
> From: xen-api-bounces@xxxxxxxxxxxxx [mailto:xen-api-bounces@xxxxxxxxxxxxx] On 
> Behalf Of Denis Cardon
> Sent: Tuesday, May 29, 2012 4:52 AM
> To: xen-api@xxxxxxxxxxxxx
> Subject: [Xen-API] xcp 1.1, linux 3.2 domu , and barrier issue
> 
> Hi everyone,
> 
> Debian Wheezy PV guest (linux kernel 3.2) currently has some issues with 
> barrier where the guest boots with read only disk.
> 
> There has been some hint to disable barrier (adding barrier=0 in fstab), and 
> it seems to indeed resolve the issue, cf links below.
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637234
> http://www.warden.pl/2012/04/10/debian-io-disk-problem-when-rebooting-on-xenserver-guest/
> 
> I wanted to know if there are any side effect to that workaround or if it is 
> safe?
> 
> Cheers,
> 
> Denis
> 
> 
> --
> Denis Cardon
> Tranquil IT Systems
> 44 bvd des pas enchantés
> 44230 Saint Sébastien sur Loire
> tel : +33 (0) 2.40.97.57.57
> http://www.tranquil-it-systems.fr
> 
> 
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