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

[Joseph Hom <jhom@xxxxxxxxxxxxx>]

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.

-----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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