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


  • To: xen-api@xxxxxxxxxxxxx
  • From: George Shuklin <george.shuklin@xxxxxxxxx>
  • Date: Wed, 30 May 2012 14:39:32 +0400
  • Delivery-date: Wed, 30 May 2012 10:39:46 +0000
  • List-id: User and development list for XCP and XAPI <xen-api.lists.xen.org>

On 29.05.2012 13:51, Denis Cardon wrote:
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?


~ half-year, more than 5k clients VM, no problems with barrier=0. (But we usually passing it as kernel command line).

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