From: Peter Zijlstra <peterz@infradead.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Ingo Molnar <mingo@kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] rcu: Create rcu_sync infrastructure
Date: Fri, 4 Oct 2013 13:36:07 +0200 [thread overview]
Message-ID: <20131004113607.GI3081@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20131004111513.GA5699@redhat.com>
On Fri, Oct 04, 2013 at 01:15:13PM +0200, Oleg Nesterov wrote:
> Of course we can fix this, but wait_for_completion/complete already
> does the necessary work: x->done acts as a resource counter which is
> always checked/incremented/decremented under the same lock.
Urgh, so now you're not using a semaphore as completion but using a
completion as semaphore.
next prev parent reply other threads:[~2013-10-04 11:36 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-02 14:56 [PATCH 0/3] Optimize the cpu hotplug locking Peter Zijlstra
2013-10-02 14:56 ` [PATCH 1/3] hotplug: Optimize {get,put}_online_cpus() Peter Zijlstra
2013-10-03 14:01 ` Peter Zijlstra
2013-10-03 16:27 ` Paul E. McKenney
2013-10-03 16:26 ` Paul E. McKenney
2013-10-02 14:56 ` [PATCH 2/3] rcu: Create rcu_sync infrastructure Peter Zijlstra
2013-10-02 15:49 ` Oleg Nesterov
2013-10-03 16:42 ` Paul E. McKenney
2013-10-08 8:18 ` Peter Zijlstra
2013-10-03 16:41 ` Paul E. McKenney
2013-10-03 17:00 ` Oleg Nesterov
2013-10-03 17:15 ` Paul E. McKenney
2013-10-03 18:40 ` Peter Zijlstra
2013-10-03 18:45 ` Paul E. McKenney
2013-10-03 18:47 ` Oleg Nesterov
2013-10-03 19:21 ` Paul E. McKenney
2013-10-03 19:32 ` Oleg Nesterov
2013-10-03 19:33 ` Oleg Nesterov
2013-10-03 19:50 ` Paul E. McKenney
2013-10-03 20:00 ` Oleg Nesterov
2013-10-03 21:10 ` Oleg Nesterov
2013-10-03 22:00 ` Paul E. McKenney
2013-10-04 11:29 ` Oleg Nesterov
2013-10-04 16:22 ` Paul E. McKenney
2013-10-04 7:18 ` Peter Zijlstra
2013-10-04 11:15 ` Oleg Nesterov
2013-10-04 11:36 ` Peter Zijlstra [this message]
2013-10-04 11:50 ` Oleg Nesterov
2013-10-04 11:44 ` Peter Zijlstra
2013-10-04 12:13 ` Oleg Nesterov
2013-10-04 12:38 ` Peter Zijlstra
2013-10-04 13:31 ` Oleg Nesterov
2013-10-04 14:43 ` Peter Zijlstra
2013-10-04 15:13 ` Oleg Nesterov
2013-10-04 16:25 ` Peter Zijlstra
2013-10-04 19:06 ` Oleg Nesterov
2013-10-04 19:41 ` Peter Zijlstra
2013-10-05 17:31 ` Oleg Nesterov
2013-10-04 7:00 ` Peter Zijlstra
2013-10-03 20:14 ` Paolo Bonzini
2013-10-04 7:01 ` Peter Zijlstra
2013-10-02 14:56 ` [PATCH 3/3] hotplug: Optimize cpu_hotplug_{begin,done}() using rcu_sync Peter Zijlstra
2013-10-03 16:48 ` Paul E. McKenney
2013-10-03 18:41 ` Peter Zijlstra
2013-10-03 18:46 ` Paul E. McKenney
2013-10-03 19:05 ` Oleg Nesterov
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