linux-kernel - Re: [PATCH rdma-next v3 0/3] RDMA: Add support for exporting dma-buf file descriptors

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Message-Id: <177029631173.955437.5307722032449149162.b4-ty@kernel.org>
Date: Thu, 05 Feb 2026 07:58:31 -0500
From: Leon Romanovsky <leon@...nel.org>
To: Jason Gunthorpe <jgg@...pe.ca>, Sumit Semwal <sumit.semwal@...aro.org>, 
 Christian König <christian.koenig@....com>, 
 Edward Srouji <edwards@...dia.com>
Cc: linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, 
 linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 linaro-mm-sig@...ts.linaro.org, Yishai Hadas <yishaih@...dia.com>
Subject: Re: [PATCH rdma-next v3 0/3] RDMA: Add support for exporting
 dma-buf file descriptors


On Sun, 01 Feb 2026 16:34:03 +0200, Edward Srouji wrote:
> This patch series introduces dma-buf export support for RDMA/InfiniBand
> devices, enabling userspace applications to export RDMA PCI-backed
> memory regions (such as device memory or mlx5 UAR pages) as dma-buf file
> descriptors.
> 
> This allows PCI device memory to be shared with other kernel subsystems
> (e.g., graphics or media) or between userspace processes, via the
> standard dma-buf interface, avoiding unnecessary copies and enabling
> efficient peer-to-peer (P2P) DMA transfers. See [1] for background on
> dma-buf.
> 
> [...]

Applied, thanks!

[1/3] RDMA/uverbs: Support external FD uobjects
      https://git.kernel.org/rdma/rdma/c/6b848074a32078
[2/3] RDMA/uverbs: Add DMABUF object type and operations
      https://git.kernel.org/rdma/rdma/c/e6738fe6cad448
[3/3] RDMA/mlx5: Implement DMABUF export ops
      https://git.kernel.org/rdma/rdma/c/992a14bb2150a1

Best regards,
-- 
Leon Romanovsky <leon@...nel.org>