[gpfsug-discuss] GPFS 3.5.0 on RHEL 6.8

[John Blaas]

We are running 3.5 w/ patch 32 on nodes with the storage cluster
running on Centos 6.8 with kernel at 2.6.32-642.1.1 and the remote
compute cluster running 2.6.32-642.3.1 without any issues.

That being said we are looking to upgrade as soon as possible to 4.1,
but thought I would add that it is possible even if not supported.

---
John Blaas

On Wed, Aug 31, 2016 at 2:26 PM, Lukas Hejtmanek <xhejtman at ics.muni.cz> wrote:
> Hello,
>
> thank you for explanation. I confirm that things are working with 573 kernel.
>
> On Tue, Aug 30, 2016 at 05:07:21PM -0400, mark.bergman at uphs.upenn.edu wrote:
>> In the message dated: Tue, 30 Aug 2016 22:39:18 +0200,
>> The pithy ruminations from Lukas Hejtmanek on
>> <[gpfsug-discuss] GPFS 3.5.0 on RHEL 6.8> were:
>> => Hello,
>>
>> GPFS 3.5.0.[23..3-0] work for me under [CentOS|ScientificLinux] 6.8,
>> but at kernel 2.6.32-573 and lower.
>>
>> I've found kernel bugs in blk_cloned_rq_check_limits() in later kernel
>> revs that caused multipath errors, resulting in GPFS being unable to
>> find all NSDs and mount the filesystem.
>>
>> I am not updating to a newer kernel until I'm certain this is resolved.
>>
>> I opened a bug with CentOS:
>>
>>       https://bugs.centos.org/view.php?id=10997
>>
>> and began an extended discussion with the (RH & SUSE) developers of that
>> chunk of kernel code. I don't know if an upstream bug has been opened
>> by RH, but see:
>>
>>       https://patchwork.kernel.org/patch/9140337/
>> =>
>> => does it work for anyone? As of kernel 2.6.32-642, GPFS 3.5.0 (including the
>> => latest patch 32) does start but does not mount and file system. The internal
>> => mount cmd gets stucked.
>> =>
>> => --
>> => Lukáš Hejtmánek
>>
>>
>> --
>> Mark Bergman                                           voice: 215-746-4061
>> mark.bergman at uphs.upenn.edu                              fax: 215-614-0266
>> http://www.cbica.upenn.edu/
>> IT Technical Director, Center for Biomedical Image Computing and Analytics
>> Department of Radiology                         University of Pennsylvania
>>           PGP Key: http://www.cbica.upenn.edu/sbia/bergman
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>
> --
> Lukáš Hejtmánek
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