linux-kernel - [PATCH 0/2] kobject: reduce uevent_sock

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Date: Wed, 14 Feb 2024 08:48:27 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Christian Brauner <brauner@...nel.org>
Cc: linux-kernel <linux-kernel@...r.kernel.org>, "Rafael J . Wysocki" <rafael@...nel.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org, 
	"David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Eric Dumazet <eric.dumazet@...il.com>, Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH 0/2] kobject: reduce uevent_sock_mutex contention

This series reduces the (small ?) contention over uevent_sock_mutex,
noticed when creating/deleting many network namespaces/devices.

1) uevent_seqnum becomes an atomic64_t

2) Only acquire uevent_sock_mutex whenever using uevent_sock_list

Eric Dumazet (2):
  kobject: make uevent_seqnum atomic
  kobject: reduce uevent_sock_mutex scope

 include/linux/kobject.h |  2 +-
 kernel/ksysfs.c         |  2 +-
 lib/kobject_uevent.c    | 24 +++++++++++-------------
 3 files changed, 13 insertions(+), 15 deletions(-)

-- 
2.43.0.687.g38aa6559b0-goog