netdev - [PATCH net v2 0/3] net: prevent deadlocks and mis-configuration with per-NAPI threaded config

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Message-ID: <20250809001205.1147153-1-kuba@kernel.org>
Date: Fri,  8 Aug 2025 17:12:02 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org,
	willemdebruijn.kernel@...il.com,
	skhawaja@...gle.com,
	joe@...a.to,
	sdf@...ichev.me,
	shuah@...nel.org,
	linux-kselftest@...r.kernel.org,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net v2 0/3] net: prevent deadlocks and mis-configuration with per-NAPI threaded config

Running the test added with a recent fix on a driver with persistent
NAPI config leads to a deadlock. The deadlock is fixed by patch 3,
patch 2 is I think a more fundamental problem with the way we
implemented the config.

I hope the fix makes sense, my own thinking is definitely colored
by my preference (IOW how the per-queue config RFC was implemented).

v2: add missing kdoc
v1: https://lore.kernel.org/20250808014952.724762-1-kuba@kernel.org

Jakub Kicinski (3):
  selftests: drv-net: don't assume device has only 2 queues
  net: update NAPI threaded config even for disabled NAPIs
  net: prevent deadlocks when enabling NAPIs with mixed kthread config

 include/linux/netdevice.h                            |  5 ++++-
 net/core/dev.h                                       |  8 ++++++++
 net/core/dev.c                                       | 12 +++++++++---
 tools/testing/selftests/drivers/net/napi_threaded.py | 10 ++++++----
 4 files changed, 27 insertions(+), 8 deletions(-)

-- 
2.50.1