[Gluster-users] 2.1 xen direct io

samppah at neutraali.net samppah at neutraali.net
Wed Oct 14 10:03:41 UTC 2009

>> After struggling with this for few hours I discovered that pv_ops kernel
>> doesn't have support for tap:aio yet. It's on the todo list, but no idea
>> what's the status of it. Any idea of distro with recent kernel, dom0 and
>> tap:aio support? :)
> RHEL/CentOS 5 uses a Xenified 2.6.18 kernel, but it's more up-to-date than
> the Xen.org 2.6.18 because Red Hat has backported more security fixes and
> drivers.

I'm running Centos 5.3 also and it supports tap:aio, but disabling direct
io mode doesn't work with GlusterFS. Even they do lots of backporting I
assume it's still missing something. RHEL 5.4 should include Fuse aswell
so I hope that makes a difference.

> SLES/OpenSUSE 11 uses a 2.6.27 kernel, with the Xen.org patches forward
> ported.  These patches have also been rebased against vanilla 2.6.29 and
> made available from
> http://code.google.com/p/gentoo-xen-kernel/downloads/list

Thanks. I'll take a look at it and let's see if it helps :)

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