linux-kernel - [PATCH v3 0/2] io_uring/io-wq: respect cgroup cpusets

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Message-Id: <20240910171157.166423-1-felix.moessbauer@siemens.com>
Date: Tue, 10 Sep 2024 19:11:55 +0200
From: Felix Moessbauer <felix.moessbauer@...mens.com>
To: axboe@...nel.dk
Cc: asml.silence@...il.com,
	linux-kernel@...r.kernel.org,
	io-uring@...r.kernel.org,
	cgroups@...r.kernel.org,
	dqminh@...udflare.com,
	longman@...hat.com,
	adriaan.schmidt@...mens.com,
	florian.bezdeka@...mens.com,
	Felix Moessbauer <felix.moessbauer@...mens.com>
Subject: [PATCH v3 0/2] io_uring/io-wq: respect cgroup cpusets

Hi,

this series continues the affinity cleanup work started in
io_uring/sqpoll. It has been successfully tested against the liburing
testsuite (make runtests), liburing @ caae94903d2e201.

The test wq-aff.t succeeds if at least cpu 0,1 are in
the set and fails otherwise. This is expected, as the test wants
to pin on these cpus. I'll send a patch for liburing to skip that test
in case this pre-condition is not met.

Changes since v2:

- rework commit message (remove ambient and worker from title as well).
  Sorry for the noise.
- no functional changes

Changes since v1:

- rework commit messages (don't use ambient cpus, wq threads are no
  pollers)
- no functional changes

Best regards,
Felix Moessbauer
Siemens AG

Felix Moessbauer (2):
  io_uring/io-wq: do not allow pinning outside of cpuset
  io_uring/io-wq: inherit cpuset of cgroup in io worker

 io_uring/io-wq.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

-- 
2.39.2