From: Leon Romanovsky <leonro@nvidia.com>
To: Olga Kornievskaia <aglo@umich.edu>
Cc: linux-rdma <linux-rdma@vger.kernel.org>
Subject: Re: question about PSN sequence error cause (mlx5)
Date: Tue, 30 Jan 2024 21:21:36 +0200 [thread overview]
Message-ID: <20240130192136.GB71813@unreal> (raw)
In-Reply-To: <CAN-5tyHSyLU-6CKrkAxsEgyA9ZUXeTGrUVSd25zJ00vgUQ5Mgg@mail.gmail.com>
On Tue, Jan 30, 2024 at 10:03:29AM -0500, Olga Kornievskaia wrote:
> Hi Leon,
>
> I have a question about the PSN sequence error emitted by the RDMA
> Roce (using Cx-6 card). Could you confirm/provide info about the
> possible cause other than the packet being dropped by the switch?
> Earlier it was confirmed that the PSN checking is done in firmware but the
> setting/getting of the PSN is done in the kernel. I wanted to confirm
> the driver can't drop packets due to resource constraints of sorts.
Driver is responsible for control-path only. All data-path is done by HW.
>
> Thank you.
parent reply other threads:[~2024-01-30 19:21 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <CAN-5tyHSyLU-6CKrkAxsEgyA9ZUXeTGrUVSd25zJ00vgUQ5Mgg@mail.gmail.com>]
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