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SubjectRe: Enabling peer to peer device transactions for PCIe devices
On Mon, Nov 28, 2016 at 04:55:23PM -0500, Serguei Sagalovitch wrote:

> >We haven't touch this in a long time and perhaps it changed, but there
> >definitely was a call back in the PeerDirect API to allow the GPU to
> >invalidate the mapping. That's what we don't want.

> I assume that you are talking about "invalidate_peer_memory()' callback?
> I was told that it is the "last resort" because HCA (and driver) is not
> able to handle it in the safe manner so it is basically "abort" everything.

If it is a last resort to save system stability then kill the impacted
process, that will release the MRs.

Jason

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