From: Leon Romanovsky <leon@kernel.org>
To: jgg@ziepe.ca, 0z5a <dezhen.lu@student.uni-tuebingen.de>
Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH rdma-rc] RDMA/mlx5: Fix DevX umem page size truncation for pages >= 4G
Date: Thu, 05 Nov 2026 14:30:20 -0500 [thread overview]
Message-ID: <179390702044.98181.15076173312140750474.b4-ty@kernel.org> (raw)
In-Reply-To: <20261103142804.67210-1-dezhen.lu@student.uni-tuebingen.de>
On Tue, 03 Nov 2026 15:28:04 +0100, 0z5a wrote:
> devx_umem_find_best_pgsize() computes the page size in an unsigned long
> but returns it as unsigned int, and devx_umem_reg_cmd_alloc() stores it
> in an unsigned int. When the DMA mapping of the umem is contiguous and
> aligned to 4 GiB or more, and the umem length is a multiple of that
> size, ib_umem_find_best_pgoff() selects a page size >= 2^32. Since the
> value is a power of two, the truncation turns it into 0 and the
> registration fails with -EINVAL.
>
> [...]
Applied, thanks!
[1/1] RDMA/mlx5: Fix DevX umem page size truncation for pages >= 4G
https://git.kernel.org/rdma/rdma/c/b5c11bf9759834
Best regards,
--
Leon Romanovsky <leon@kernel.org>
next prev parent reply other threads:[~2026-11-05 19:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 14:28 0z5a
2026-11-04 10:07 ` Leon Romanovsky
2026-11-04 17:40 ` Jason Gunthorpe
2026-11-04 17:38 ` Jason Gunthorpe
2026-11-05 19:30 ` Leon Romanovsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-11-03 14:27 0z5a
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