Messages in this thread | | | From | Logan Gunthorpe <> | Date | Mon, 8 Jan 2018 12:05:57 -0700 | Subject | Re: [PATCH 06/12] IB/core: Add optional PCI P2P flag to rdma_rw_ctx_[init|destroy]() |
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On 08/01/18 11:57 AM, Christoph Hellwig wrote: > It does, sort of - but in a different way then the normal DMA map > ops. And only to work around the fact that we need to map our > P2P space into struct pages. Without that we could just pass the > bus address around, but the Linux stack and VM isn't anywhere near > ready for something that advanced.
Yeah, wouldn't that be nice.
Ok, so if we shouldn't touch the dma_map infrastructure how should the workaround to opt-out HFI and QIB look? I'm not that familiar with the RDMA code.
Thanks,
Logan
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