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Mon, 27 Apr 2026 11:20:28 -0700 (PDT) Date: Mon, 27 Apr 2026 11:20:25 -0700 From: Stephen Hemminger To: David Ahern Cc: Chiara Meiohas , leon@kernel.org, michaelgur@nvidia.com, jgg@nvidia.com, linux-rdma@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH v2 iproute2-next 0/4] Introduce FRMR pools Message-ID: <20260427112025.49ebbd73@phoenix.local> In-Reply-To: References: <20260330173118.766885-1-cmeiohas@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sun, 5 Apr 2026 11:09:55 -0600 David Ahern wrote: > On 3/30/26 11:31 AM, Chiara Meiohas wrote: > > From Michael: > > > > This series adds support for managing Fast Registration Memory Region > > (FRMR) pools in rdma tool, enabling users to monitor and configure FRMR > > pool behavior. > > > > FRMR pools are used to cache and reuse Fast Registration Memory Region > > handles to improve performance by avoiding the overhead of repeated > > memory region creation and destruction. This series introduces commands > > to view FRMR pool statistics and configure pool parameters such as > > aging time and pinned handle count. > > > > The 'show' command allows users to display FRMR pools created on > > devices, their properties, and usage statistics. Each pool is identified > > by a unique key (hex-encoded properties) for easy reference in > > subsequent operations. > > > > The aging 'set' command allows users to modify the aging time parameter, > > which controls how long unused FRMR handles remain in the pool before > > being released. > > > > The pinned 'set' command allows users to configure the number of pinned > > handles in a pool. Pinned handles are exempt from aging and remain > > permanently available for reuse, which is useful for workloads with > > predictable memory region usage patterns. > > > > Command usage and examples are included in the commits and man pages. > > > > These patches are complimentary to the kernel patches: > > https://lore.kernel.org/linux-rdma/20260226-frmr_pools-v4-0-95360b54f15e@nvidia.com/ > > > > applied after fixing up a few nits. > > Please clone the ai review prompts from: > https://github.com/masoncl/review-prompts.git > > Run the setup scripts and have ai review patches before sending. This > should really be part of both kernel and iproute2 development workflow now. I rebased UAPI headers based on 7.1-rc1 and iproute2/rdma will not build. Looks like RDMA did not get merged in 7.1. Will have to back it out if not going in 7.1