From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>
Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
Yishai Hadas <yishaih@nvidia.com>,
Or Har-Toov <ohartoov@nvidia.com>,
Michael Guralnik <michaelgur@nvidia.com>,
Edward Srouji <edwards@nvidia.com>
Subject: Re: [PATCH rdma-next] IB/mlx5: Reduce IMR KSM size when 5-level paging is enabled
Date: Sun, 23 Nov 2025 04:13:14 -0500 [thread overview]
Message-ID: <176388919468.1783514.9358959459855331067.b4-ty@kernel.org> (raw)
In-Reply-To: <20251120-reduce-ksm-v1-1-6864bfc814dc@kernel.org>
On Thu, 20 Nov 2025 16:49:28 +0200, Leon Romanovsky wrote:
> Enabling 5-level paging (LA57) increases TASK_SIZE on x86_64 from 2^47
> to 2^56. This affects implicit ODP, which uses TASK_SIZE to calculate
> the number of IMR KSM entries.
>
> As a result, the number of entries and the memory usage for KSM mkeys
> increase drastically:
>
> [...]
Applied, thanks!
[1/1] IB/mlx5: Reduce IMR KSM size when 5-level paging is enabled
https://git.kernel.org/rdma/rdma/c/4bf35d1d17c8d5
Best regards,
--
Leon Romanovsky <leon@kernel.org>
prev parent reply other threads:[~2025-11-23 9:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-20 14:49 Leon Romanovsky
2025-11-23 9:13 ` Leon Romanovsky [this message]
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