[Beowulf] RHEL7 kernel update for L1TF vulnerability breaks RDMA

Jörg Saßmannshausen sassy-work at sassy.formativ.net
Sat Aug 18 03:47:58 PDT 2018

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.

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

All the beset


Am Samstag, 18. August 2018, 18:31:35 BST schrieb Christopher Samuel:
> On 18/08/18 17:22, Jörg Saßmannshausen wrote:
> > if the problem is RMDA, how about InfiniBand? Will that be broken as
> > well?
> For RDMA it appears yes, though IPoIB still works for us (though ours is
> OPA rather than IB Kilian reported the same).
> All the best,
> Chris

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