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From: Kuniyuki Iwashima <kuniyu@amazon.com>
To: Johannes Berg <johannes.berg@intel.com>
Cc: Alexandre Ferrieux <alexandre.ferrieux@gmail.com>,
	Kuniyuki Iwashima <kuniyu@amazon.com>,
	Kuniyuki Iwashima <kuni1840@gmail.com>,
	<linux-wireless@vger.kernel.org>
Subject: [PATCH v1 wl-next 0/3] wifi: wext: Namespacify wireless_nlevent_flush() calls.
Date: Mon, 14 Oct 2024 13:55:40 -0700	[thread overview]
Message-ID: <20241014205543.94787-1-kuniyu@amazon.com> (raw)

Currently, wext's netdev notifier calls wireless_nlevent_flush()
for any event of any device and iterates all netns.

It happens even on a host without wext devices and is problematic
if the host has thousands of netns & devices as reported in the
thread below. [0]

This series will address the issue by removing the netns iteration
in wireless_nlevent_flush().

[0]: https://lore.kernel.org/netdev/CAKYWH0Ti3=4GeeuVyWKJ9LyTuRnf3Wy9GKg4Jb7tdeaT39qADA@mail.gmail.com/


Kuniyuki Iwashima (3):
  wifi: wext: Move wext_nlevents to net->gen[].
  wifi: wext: Convert wireless_nlevent_work to per-netns work.
  wifi: wext: Don't iterate all netns in wireless_nlevent_flush().

 include/net/iw_handler.h    |  4 +--
 include/net/net_namespace.h |  3 --
 net/wireless/core.c         |  2 +-
 net/wireless/wext-core.c    | 69 +++++++++++++++++++++++++------------
 4 files changed, 50 insertions(+), 28 deletions(-)

-- 
2.39.5 (Apple Git-154)


             reply	other threads:[~2024-10-14 20:55 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-14 20:55 Kuniyuki Iwashima [this message]
2024-10-14 20:55 ` [PATCH v1 wl-next 1/3] wifi: wext: Move wext_nlevents to net->gen[] Kuniyuki Iwashima
2024-10-15  6:36   ` Johannes Berg
2024-10-16  0:49     ` Kuniyuki Iwashima
2024-10-16  8:56       ` Johannes Berg
2024-10-16 23:58         ` Kuniyuki Iwashima
2024-10-17  8:06           ` Johannes Berg
2024-10-14 20:55 ` [PATCH v1 wl-next 2/3] wifi: wext: Convert wireless_nlevent_work to per-netns work Kuniyuki Iwashima
2024-10-14 20:55 ` [PATCH v1 wl-next 3/3] wifi: wext: Don't iterate all netns in wireless_nlevent_flush() Kuniyuki Iwashima

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