[RFC PATCH v2] nvme: enable PCI P2PDMA support for RDMA transport

Christoph Hellwig hch at lst.de
Sun Apr 5 22:41:20 PDT 2026


On Thu, Apr 02, 2026 at 07:30:01AM +0000, Shivaji Kant wrote:
> Enable BLK_FEAT_PCI_P2PDMA on the NVMe when the underlying
> RDMA controller supports it.

You can use up to 73 characters per line.
> 
> This patch depends on the PCI P2PDMA support added in this
> patch [1].

I don't think it actually does.  To support multi-path capable RDMA
controllers, and those the vast majority, you need the multipath
support.  But for non-multipath capable controllers your patch
just works.  So I'd suggest to drop this paragraph and reference
from the commit log.

Otherwise looks good.




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