I know it is hard to tell, but any idea when 2.1 will be stable? I need to run xen with out --disable-direct-io and my understanding is that works in 2.1. What kernel is required for that? Does it require the latest fuse in 2.6.31 or can I use it on a Centos 5.2 2.6.18 xen kernel? Last question... will 2.1 allow me to use tap:aio?><>Nathan Stratton CTO, BlinkMind, Inc. nathan at robotics.net nathan at blinkmind.com http://www.robotics.net http://www.blinkmind.com
On Thu, Oct 8, 2009 at 8:04 AM, Nathan Stratton <nathan at robotics.net> wrote:> > I know it is hard to tell, but any idea when 2.1 will be stable? I need to > run xen with out --disable-direct-io and my understanding is that works in > 2.1. What kernel is required for that? Does it require the latest fuse in > 2.6.31 or can I use it on a Centos 5.2 2.6.18 xen kernel? > > Last question... will 2.1 allow me to use tap:aio?2.1 RC1 is scheduled on 19th Oct. You will need 2.6.26+ kernel for the performance enhancements. There are no custom kernel fuse modules from 2.6.26 onwards. 2.6.18 will still need --disable-direct-io mode. Let me get back to you with the tap:aio answer. Avati
>> 2.1 RC1 is scheduled on 19th Oct. You will need 2.6.26+ kernel for the >> performance enhancements. There are no custom kernel fuse modules from >> 2.6.26 onwards. 2.6.18 will still need --disable-direct-io mode. Let >> me get back to you with the tap:aio answer. > >So what kernel are you guys running on? Are you testing on a xen dom0 >kernel?I was able to use Xen images in file mode without using --disable-direct-io-mode when running Fedora 12 alpha with 2.6.31.3-1.2.71.xendom0 kernel and Git version of GlusterFS. Unfortunately, I had to disable all performance translators on client side because using them crashed the client even when running ls. I also tried with tap:aio and it got bit further than before. Instead of hanging domU it gave me timeout error when trying to connect to the device. -samuli
>> 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/listThanks. I'll take a look at it and let's see if it helps :)