linux-kernel - [PATCH net-next 0/3] net/smc: buffer allocation and registration improvements

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Message-ID: <20260123082349.42663-1-alibuda@linux.alibaba.com>
Date: Fri, 23 Jan 2026 16:23:46 +0800
From: "D. Wythe" <alibuda@...ux.alibaba.com>
To: "David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dust Li <dust.li@...ux.alibaba.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Sidraya Jayagond <sidraya@...ux.ibm.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Wenjia Zhang <wenjia@...ux.ibm.com>
Cc: Mahanta Jambigi <mjambigi@...ux.ibm.com>,
	Simon Horman <horms@...nel.org>,
	Tony Lu <tonylu@...ux.alibaba.com>,
	Wen Gu <guwen@...ux.alibaba.com>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-rdma@...r.kernel.org,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	oliver.yang@...ux.alibaba.com
Subject: [PATCH net-next 0/3] net/smc: buffer allocation and registration improvements

This series improves SMC-R buffer management by refining the allocation
logic and reducing hardware resource overhead during registration. 

The primary improvement is the significant reduction in MTTE consumption.
By aligning IB registration with the actual physical block sizes, we can
reduce the entry count from one per 4KB page to just one per contiguous
block. This is especially beneficial for large buffers, preventing
hardware resource exhaustion on RDMA NICs.

D. Wythe (3):
  net/smc: cap allocation order for SMC-R physically contiguous buffers
  mm: vmalloc: export find_vm_area()
  net/smc: optimize MTTE consumption for SMC-R buffers

 mm/vmalloc.c       |  1 +
 net/smc/smc_core.c | 31 ++++++++++++++++++-------------
 net/smc/smc_ib.c   | 23 ++++++++++++++++++++---
 3 files changed, 39 insertions(+), 16 deletions(-)

-- 
2.45.0