[Lustre-discuss] Lustre on recent kernels (3.1/2)

Johann Lombardi johann at whamcloud.com
Fri Jan 13 06:42:57 PST 2012

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 Lombardi
Whamcloud, Inc.

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