linux-kernel - [PATCH net-next 0/3] ppp: improve receive path performance

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Message-ID: <20250625034021.3650359-1-dqfext@gmail.com>
Date: Wed, 25 Jun 2025 11:40:17 +0800
From: Qingfang Deng <dqfext@...il.com>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	linux-ppp@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Guillaume Nault <gnault@...hat.com>
Subject: [PATCH net-next 0/3] ppp: improve receive path performance

This patch series improves the performance of the PPPoE receive paths.

Patch 1 converts the ppp->rlock from a spinlock to a read-write lock,
allowing concurrent receive-side processing when no state is being
modified.

Patch 2 optimizes PPPoE receive performance by bypassing sk_receive_skb()
when the socket is in the PPPOX_BOUND state, avoiding unnecessary socket
locking and overhead.

Patch 3 synchronizes all updates to net_device->stats using
DEV_STATS_INC() to prevent data races now that the receive path may run on
multiple CPUs.

Qingfang Deng (3):
  ppp: convert rlock to rwlock to improve RX concurrency
  pppoe: call ppp_input directly when PPPOX_BOUND
  ppp: synchronize netstats updates

 drivers/net/ppp/ppp_generic.c | 32 +++++++++++++++++---------------
 drivers/net/ppp/pppoe.c       | 10 +++++++++-
 2 files changed, 26 insertions(+), 16 deletions(-)

-- 
2.43.0