From: Boqun Feng <boqun.feng@gmail.com>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: rcu@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Waiman Long <longman@redhat.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Davidlohr Bueso <dave@stgolabs.net>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <quic_neeraju@quicinc.com>,
Joel Fernandes <joel@joelfernandes.org>,
Shuah Khan <shuah@kernel.org>,
David Woodhouse <dwmw2@infradead.org>,
Paolo Bonzini <pbonzini@redhat.com>,
kvm@vger.kernel.org, seanjc@google.com,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
kernel test robot <oliver.sang@intel.com>
Subject: Re: [PATCH rcu 3/7] locking: Reduce the number of locks in ww_mutex stress tests
Date: Fri, 17 Mar 2023 14:26:22 -0700 [thread overview]
Message-ID: <ZBTa/pQ1cm9V4Pvn@boqun-archlinux> (raw)
In-Reply-To: <2e8a6800-78e7-42bf-b4ff-5d7ef43511c5@paulmck-laptop>
On Fri, Mar 17, 2023 at 11:38:19AM -0700, Paul E. McKenney wrote:
> On Thu, Mar 16, 2023 at 08:13:35PM -0700, Boqun Feng wrote:
> > The stress test in test_ww_mutex_init() uses 4095 locks since
> > lockdep::reference has 12 bits, and since we are going to reduce it to
> > 11 bits to support lock_sync(), and 2047 is still a reasonable number of
> > the max nesting level for locks, so adjust the test.
> >
> > Reported-by: kernel test robot <oliver.sang@intel.com>
> > Link: https://lore.kernel.org/oe-lkp/202302011445.9d99dae2-oliver.sang@intel.com
> > Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
>
> Tested-by: Paul E. McKenney <paulmck@kernel.org>
>
Applied, thanks!
Regards,
Boqun
> > ---
> > kernel/locking/test-ww_mutex.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c
> > index 29dc253d03af..93cca6e69860 100644
> > --- a/kernel/locking/test-ww_mutex.c
> > +++ b/kernel/locking/test-ww_mutex.c
> > @@ -659,7 +659,7 @@ static int __init test_ww_mutex_init(void)
> > if (ret)
> > return ret;
> >
> > - ret = stress(4095, hweight32(STRESS_ALL)*ncpus, STRESS_ALL);
> > + ret = stress(2047, hweight32(STRESS_ALL)*ncpus, STRESS_ALL);
> > if (ret)
> > return ret;
> >
> > --
> > 2.39.2
> >
next prev parent reply other threads:[~2023-03-17 21:26 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 3:13 [PATCH rcu 0/7] RCU-related lockdep changes for v6.4 Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 1/7] locking/lockdep: Introduce lock_sync() Boqun Feng
2023-03-20 17:06 ` Davidlohr Bueso
2023-03-20 17:50 ` Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 2/7] rcu: Annotate SRCU's update-side lockdep dependencies Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 3/7] locking: Reduce the number of locks in ww_mutex stress tests Boqun Feng
2023-03-17 18:38 ` Paul E. McKenney
2023-03-17 21:26 ` Boqun Feng [this message]
2023-03-17 3:13 ` [PATCH rcu 4/7] locking/lockdep: Improve the deadlock scenario print for sync and read lock Boqun Feng
2023-03-20 12:13 ` Peter Zijlstra
2023-03-20 17:50 ` Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 5/7] rcutorture: Add SRCU deadlock scenarios Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 6/7] rcutorture: Add RCU Tasks Trace and " Boqun Feng
2023-03-17 3:13 ` [PATCH rcu 7/7] rcutorture: Add srcu_lockdep.sh Boqun Feng
2023-03-20 18:19 ` Boqun Feng
2023-03-20 19:09 ` Paul E. McKenney
2023-03-20 19:28 ` Boqun Feng
2023-03-20 20:22 ` Paul E. McKenney
2023-03-20 20:26 ` Boqun Feng
2023-03-20 20:36 ` Paul E. McKenney
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