From: Leon Romanovsky <leon@kernel.org>
To: linux-rdma@vger.kernel.org, Jason Gunthorpe <jgg@ziepe.ca>,
Michael Margolin <mrgolin@amazon.com>
Cc: sleybo@amazon.com, matua@amazon.com, gal.pressman@linux.dev,
Firas Jahjah <firasj@amazon.com>,
Yonatan Nachum <ynachum@amazon.com>
Subject: Re: [PATCH for-next] RDMA/core: Fix best page size finding when it can cross SG entries
Date: Thu, 13 Feb 2025 07:53:44 -0500 [thread overview]
Message-ID: <173945122413.294504.1292933084740931802.b4-ty@kernel.org> (raw)
In-Reply-To: <20250209142608.21230-1-mrgolin@amazon.com>
On Sun, 09 Feb 2025 14:26:08 +0000, Michael Margolin wrote:
> A single scatter-gather entry is limited by a 32 bits "length" field
> that is practically 4GB - PAGE_SIZE. This means that even when the
> memory is physically contiguous, we might need more than one entry to
> represent it. Additionally when using dmabuf, the sg_table might be
> originated outside the subsystem and optimized for other needs.
>
> For instance an SGT of 16GB GPU continuous memory might look like this:
> (a real life example)
>
> [...]
Applied, thanks!
[1/1] RDMA/core: Fix best page size finding when it can cross SG entries
https://git.kernel.org/rdma/rdma/c/a4b57de5dfef29
Best regards,
--
Leon Romanovsky <leon@kernel.org>
next prev parent reply other threads:[~2025-02-13 12:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-09 14:26 [PATCH for-next] RDMA/core: Fix best page size finding when it can cross SG entries Michael Margolin
2025-02-13 12:51 ` Leon Romanovsky
2025-02-13 14:04 ` Jason Gunthorpe
2025-02-13 14:30 ` Margolin, Michael
2025-02-13 14:42 ` Jason Gunthorpe
2025-02-13 17:25 ` Margolin, Michael
2025-02-13 17:35 ` Leon Romanovsky
2025-02-13 17:40 ` Jason Gunthorpe
2025-02-13 17:55 ` Leon Romanovsky
2025-02-13 18:12 ` Jason Gunthorpe
2025-02-14 5:55 ` Leon Romanovsky
2025-02-14 15:33 ` Jason Gunthorpe
2025-02-16 8:07 ` Leon Romanovsky
2025-02-17 8:40 ` Margolin, Michael
2025-02-13 12:53 ` Leon Romanovsky [this message]
2025-02-14 6:57 ` Leon Romanovsky
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