Re: [PATCH V3 1/5] RDMA/core: Transport-independent access flags

'Christoph Hellwig'
2015-07-14T15:36:19Z

On Tue, Jul 14, 2015 at 12:10:36PM +0300, Sagi Grimberg wrote:
> Having an API that does FRMR/FMR/PHYS_MR is even worse from the ULP
> PoV. If you expose an API that might schedule (PHYS_MR) it limits the
> context that the caller is allowed to call in.
>
> I'm 100% against an registration API that *might* schedule.

Oh, I had missed that PHYS_MR might sleep. That might be the reasons
why everyone is avoiding them despite Tom preferring them over FMR.

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