netdev - [RFC iproute2-next 0/4] Introduce FRMR pools

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Message-ID: <20251222132549.995921-1-phaddad@nvidia.com>
Date: Mon, 22 Dec 2025 15:25:42 +0200
From: Patrisious Haddad <phaddad@...dia.com>
To: <leon@...nel.org>, <dsahern@...il.com>, <stephen@...workplumber.org>
CC: Patrisious Haddad <phaddad@...dia.com>, <netdev@...r.kernel.org>,
	<jgg@...dia.com>, <michaelgur@...dia.com>, <linux-rdma@...r.kernel.org>
Subject: [RFC iproute2-next 0/4] Introduce FRMR pools

>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.

Michael Guralnik (4):
  rdma: Update headers
  rdma: Add resource FRMR pools show command
  rdma: Add FRMR pools set aging command
  rdma: Add FRMR pools set pinned command

 man/man8/rdma-resource.8              |  51 +++-
 rdma/Makefile                         |   2 +-
 rdma/include/uapi/rdma/rdma_netlink.h |  22 ++
 rdma/res-frmr-pools.c                 | 342 ++++++++++++++++++++++++++
 rdma/res.c                            |  19 +-
 rdma/res.h                            |  20 ++
 6 files changed, 453 insertions(+), 3 deletions(-)
 create mode 100644 rdma/res-frmr-pools.c

-- 
2.47.0