[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

Chris Samuel chris at csamuel.org
Sat Aug 18 04:56:52 PDT 2018

On 18/8/18 8:47 pm, Jörg Saßmannshausen wrote:

> Hi Chris,


> these are bad news if InfiniBand will be affected here as well as
> that is what we need to use for parallel calculations. They make use
> of RMDA and if that has a problem..... well, you get the idea I
> guess.

Oh yes, this is why I wanted to bring it to everyones attention, this
isn't just about Lustre, it's much more widespread.

> Has anybody contacted the vendors like Mellanox or Intel regarding
> this?

As Kilian wrote in the Lustre bug quoting his RHEL bug:


     — Comment #3 from Don Dutile <ddutile at redhat.com> —
     Already reported and being actively fixed.

     Cannot make this public, as the patch that caused it was due to 
     security fix.

     This issue has highest priority for resolution.
     Revert to 3.10.0-862.11.5.el7 in the mean time.

     This bug has been marked as a duplicate of bug 1616346

  Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

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