[Beowulf] Enabling I/OAT and DCA on a live system

[Chris Samuel]

Hiya,

----- "Linus Harling" <linus at ussarna.se> wrote:

> Hi All, though this might be of interest to someone
> on the list. It is an article about how to enable
> I/OAT and DCA on a live system or a system that
> hides the option in the BIOS.

Be careful though, we hit some nasty kernel panics
on an IBM system when trying to use 2.6.28.x with
I/OAT and DCA due to suspected locking problems in
the kernel.

We're currently stuck on 2.6.28.x due to the fact
that NFS export of XFS filesystems has is broken
to the point of causing a kernel panic in 2.6.29.x
and 2.6.30.x at present. :-(

http://bugzilla.kernel.org/show_bug.cgi?id=13375

cheers,
Chris
-- 
Christopher Samuel - (03) 9925 4751 - Systems Manager
 The Victorian Partnership for Advanced Computing
 P.O. Box 201, Carlton South, VIC 3053, Australia
VPAC is a not-for-profit Registered Research Agency