On Thu, May 17, 2018 at 07:10:04PM -0400, Tom Talpey wrote:
> What's the security risk? This type of direct i/o behavior is not
> uncommon, and can certainly be made safe, using the appropriate
> memory registration and protection domains. Any risk needs to be
> stated explicitly, and mitigation provided, or at least described.

And in fact it is the same behavior you'll see on NFS over RDMA, or
a block device or any local fs over SRP/iSER/NVMe over Fabrics..

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