Lustre discuss - Jan 2012 - Lustre on recent kernels (3.1/2)

Hi everyone. Is it planned to port Lustre to a recent kernel version, such as
the new 3.2?

I''m asking because we run into a nasty RHEL kernel bug (still
reproducible on 2.6.32-220):

  https://lkml.org/lkml/2011/12/7/459

We tried to contact RHEL to support us on this issue, but so far we had no
response. Meanwhile we migrated all our workload on a recent kernel version
(starting with 3.1) and we weren''t able to reproduce the problem
anymore. We don''t have the resources to debug/trace-back the problem
ourselves, so we switched away from Lustre during that time.

Thanks for any pointer.

On Fri, Jan 13, 2012 at 03:08:41PM +0100, Yuri D''Elia
wrote:
> I''m asking because we run into a nasty RHEL kernel bug (still
reproducible on 2.6.32-220):
> 
>   https://lkml.org/lkml/2011/12/7/459
This looks like a problem with transparent huge pages & page migration. Have
you tried to disable that?
# cat /sys/kernel/mm/redhat_transparent_hugepage/enabled
[always] never
# echo never > /sys/kernel/mm/redhat_transparent_hugepage/enabled

Lustre also does not handle page migration properly, that''s why we fail
all page migration attempt for now (see LU-130).

Johann
-- 
Johann Lombardi
Whamcloud, Inc.
www.whamcloud.com