[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

[Jeff Johnson]

With the spate of security flaws over the past year and the impacts their
fixes have on performance and functionality it might be worthwhile to just
run airgapped.


On Thu, Aug 16, 2018 at 22:48 Chris Samuel <chris at csamuel.org> wrote:

> Hi all,
>
> Just a heads up that the 3.10.0-862.11.6.el7.x86_64 kernel from
> RHEL/CentOS
> that was released to address the most recent Intel CPU problem "L1TF"
> seems to
> break RDMA (found by a colleague here at Swinburne).   The discovery came
> about when testing the new kernel on a system running Lustre.
>
> https://jira.whamcloud.com/browse/LU-11257
>
> Stanford have reported it to Red Hat, but the BZ entry is locked due to
> its
> relationship with L1TF.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1618452
>
> Hope this helps folks out there..
>
> All the best,
> Chris
> --
>  Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC
>
>
>
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-- 
------------------------------
Jeff Johnson
Co-Founder
Aeon Computing

jeff.johnson at aeoncomputing.com
www.aeoncomputing.com
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High-Performance Computing / Lustre Filesystems / Scale-out Storage
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