Barrier issue

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Revision as of 02:30, 30 May 2012 by Nick (talk | contribs)

In recent domU kernels, we need to mount the filesystems with barrier=0, because the old dom0 kernels lie about their barrier support or something. Maybe barriers are really obsolete anyway though?

I forget where I read now, about the old dom0s lying about the barrier support which is how the filesystem can become out of whack. Is that really true?

added by lsc:

So this is a problem with the 2.6.32 dom0 kernels, but not the 2.6.18-308.4.1.el5xen (CentOS-xen) dom0 kernels? if so, perhaps we should upgrade everything to the centos-xen kernels?

We've also had the problem on hamper, which is running I will also try to test this on the centos dom0 kernel. --Nick 22:29, 29 May 2012 (EDT)