Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2;
Date:   Fri, 22 Sep 2023 04:35:58 +0000
Mime-Version: 1.0
Message-ID: <20230922043616.19282-1-jstultz@google.com>
Subject: [PATCH 0/3] Fixes for test-ww_mutex stress test
From:   John Stultz <jstultz@google.com>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     John Stultz <jstultz@google.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
        Waiman Long <longman@redhat.com>,
        Boqun Feng <boqun.feng@gmail.com>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Joel Fernandes <joelaf@google.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        kernel-team@android.com
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

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

This test 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@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: kernel-team@android.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(-)

-- 
2.42.0.515.g380fc7ccd1-goog