linux-kernel - [RFC][PATCH 0/3] Fixes for test-ww

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Date:   Tue,  8 Aug 2023 06:26:40 +0000
From:   John Stultz <jstultz@...gle.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     John Stultz <jstultz@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joelaf@...gle.com>,
        Li Zhijian <zhijianx.li@...el.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        kernel-team@...roid.com
Subject: [RFC][PATCH 0/3] Fixes for test-ww_mutex stress test

As part of recent stabilizing of the proxy-execution series,
I've seen a number of issues from the test-ww_mutex module.

This is great for shaking out problems in the patches, but
in some cases it seems the patch series has made it easier
to uncover problems in the test-ww_mutex stress tests.

So this patch series provides a few fixes that I've come
up with in testing with qemu using large cpu counts.

Feedback would be greatly appreciated!

thanks
-john

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Will Deacon <will@...nel.org>
Cc: Waiman Long <longman@...hat.com>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: "Paul E . McKenney" <paulmck@...nel.org>
Cc: Joel Fernandes <joelaf@...gle.com>
Cc: Li Zhijian <zhijianx.li@...el.com>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: kernel-team@...roid.com

John Stultz (3):
  test-ww_mutex: Use prng instead of rng to avoid hangs at bootup
  test-ww_mutex: Fix potential workqueue corruption
  test-ww_mutex: Make sure we bail out instead of livelock

 kernel/locking/test-ww_mutex.c | 48 ++++++++++++++++++++++++----------
 1 file changed, 34 insertions(+), 14 deletions(-)

-- 
2.41.0.640.ga95def55d0-goog