From: Jason Gunthorpe <jgg@nvidia.com>
To: Yonatan Nachum <ynachum@amazon.com>
Cc: leon@kernel.org, linux-rdma@vger.kernel.org, mrgolin@amazon.com,
sleybo@amazon.com, matua@amazon.com, gal.pressman@linux.dev,
Yehuda Yitschak <yehuday@amazon.com>
Subject: Re: [PATCH for-next] RDMA/efa: Expose device P2P DMA support via device query
Date: Mon, 4 May 2026 04:34:12 -0300 [thread overview]
Message-ID: <afhL9DLUVhnVyzZu@nvidia.com> (raw)
In-Reply-To: <20260503150246.2349679-1-ynachum@amazon.com>
On Sun, May 03, 2026 at 03:02:46PM +0000, Yonatan Nachum wrote:
> Expose device P2P DMA support using the query device verbs.
> If the device support P2P DMA, it can DMA directly to and from a peer
> PCIe device
This doesn't seem right, this should be policed by failing to
established p2p mappings and to fail mapping dmabufs not with random
user space bits like this.
There are lots of things in our system that need this feedback to go
down that path.
Jason
next prev parent reply other threads:[~2026-05-04 7:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-03 15:02 [PATCH for-next] RDMA/efa: Expose device P2P DMA support via device query Yonatan Nachum
2026-05-04 7:34 ` Jason Gunthorpe [this message]
2026-05-05 8:15 ` Yonatan Nachum
2026-05-05 15:40 ` Jason Gunthorpe
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