From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: linux-kernel@vger.kernel.org, mingo@kernel.org,
jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com,
bobby.prani@gmail.com
Subject: Re: [PATCH tip/core/rcu 14/19] rcu: Extend expedited funnel locking to rcu_data structure
Date: Tue, 22 Sep 2015 08:10:51 -0700 [thread overview]
Message-ID: <20150922151051.GL4029@linux.vnet.ibm.com> (raw)
In-Reply-To: <56007F02.2070807@oracle.com>
On Mon, Sep 21, 2015 at 06:04:50PM -0400, Sasha Levin wrote:
> On 09/21/2015 12:12 AM, Paul E. McKenney wrote:
> > Hmmm... I created rdp->exp_funnel_mutex, but failed to give RCU-sched
> > its own lock class. Does the following untested patch fix things for you?
>
> Haven't reproduced yet, but it didn't happen that often before - let's give it
> another day or two of testing?
Fair enough!
I didn't see it in my testing, but later patches eliminate this
locking situation entirely, so I didn't put that much time into it.
Thanx, Paul
next prev parent reply other threads:[~2015-09-22 15:11 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 23:29 [PATCH tip/core/rcu 0/19] Expedited grace period changes for 4.3 Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 01/19] rcu: Stop disabling CPU hotplug in synchronize_rcu_expedited() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 02/19] rcu: Remove CONFIG_RCU_CPU_STALL_INFO Paul E. McKenney
2015-07-30 12:49 ` Peter Zijlstra
2015-07-30 15:13 ` Paul E. McKenney
2015-07-30 15:31 ` Peter Zijlstra
2015-07-30 15:45 ` Josh Triplett
2015-07-17 23:29 ` [PATCH tip/core/rcu 03/19] rcu: Switch synchronize_sched_expedited() to stop_one_cpu() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 04/19] rcu: Rework synchronize_sched_expedited() counter handling Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 05/19] rcu: Get rid of synchronize_sched_expedited()'s polling loop Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 06/19] rcu: Make expedited GP CPU stoppage asynchronous Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 07/19] rcu: Abstract sequence counting from synchronize_sched_expedited() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 08/19] rcu: Make synchronize_rcu_expedited() use sequence-counter scheme Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 09/19] rcu: Abstract funnel locking from synchronize_sched_expedited() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 10/19] rcu: Fix synchronize_sched_expedited() type error for "s" Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 11/19] rcu: Use funnel locking for synchronize_rcu_expedited()'s polling loop Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 12/19] rcu: Apply rcu_seq operations to _rcu_barrier() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 13/19] rcu: Consolidate last open-coded expedited memory barrier Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 14/19] rcu: Extend expedited funnel locking to rcu_data structure Paul E. McKenney
2015-09-20 14:58 ` Sasha Levin
2015-09-21 4:12 ` Paul E. McKenney
2015-09-21 22:04 ` Sasha Levin
2015-09-22 15:10 ` Paul E. McKenney [this message]
2015-07-17 23:29 ` [PATCH tip/core/rcu 15/19] rcu: Add stall warnings to synchronize_sched_expedited() Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 16/19] documentation: Describe new expedited stall warnings Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 17/19] rcu: Pull out wait_event*() condition into helper function Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 18/19] rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS Paul E. McKenney
2015-07-17 23:29 ` [PATCH tip/core/rcu 19/19] rcu: Add fastpath bypassing funnel locking Paul E. McKenney
2015-07-30 14:44 ` Peter Zijlstra
2015-07-30 15:34 ` Paul E. McKenney
2015-07-30 15:40 ` Peter Zijlstra
2015-08-03 20:05 ` Steven Rostedt
2015-08-03 20:06 ` Peter Zijlstra
2015-07-30 16:34 ` Peter Zijlstra
2015-07-31 15:57 ` Paul E. McKenney
2015-07-31 2:03 ` Waiman Long
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