[lustre-devel] [PATCH 7/9] lustre: lnet: Stop MLX5 triggering a dump_cqe

NeilBrown neilb at suse.com
Mon Nov 26 18:21:08 PST 2018

On Mon, Nov 26 2018, James Simmons wrote:

>> From: Doug Oucharek <doug.s.oucharek at intel.com>
>> We have found that MLX5 will trigger a dump_cqe if we don't
>> invalidate the rkey on a newly allocated MR for FastReg usage.
>> This fix just tags the MR as invalid on its creation if we are
>> using FastReg and that will force it to do an invalidate of the
>> rkey on first usage.
> I pushed this one already, see https://lkml.org/lkml/2018/3/16/1410.
> Dan felt this was more a infiniband layer bug that needed to be fixed.
> It could be fixed already upstream or if it is not once this problem
> is reported we will need to work the rdma group to fix it.

Thanks.  I've dropped it for now.

If I had any idea about infiniband, I might look at the MLX driver - but
I don't :-(

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