From: paulmck@linux.vnet.ibm.com (Paul E. McKenney)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC idle 2/3] arm: Avoid invoking RCU when CPU is idle
Date: Thu, 2 Feb 2012 15:27:36 -0800 [thread overview]
Message-ID: <20120202232736.GL2518@linux.vnet.ibm.com> (raw)
In-Reply-To: <1328223819.5882.133.camel@gandalf.stny.rr.com>
On Thu, Feb 02, 2012 at 06:03:39PM -0500, Steven Rostedt wrote:
[ . . . ]
> Anyway, one answer is (and I was talking with Paul about this on IRC) is
> that we can create a special "TRACE_EVENT_IDLE()" that will explicitly
> call "rcu_idle_exit/enter()" as it expects to be called with it off.
>
> This should solve most issues I believe.
You OK with something like RCU_NONIDLE() rather than RCU_EVENT_IDLE()?
I have this funny feeling that tracing won't be the only thing using
RCU from idle. :-/
Something like this, perhaps?
#define RCU_NONIDLE(a) \
do { \
rcu_idle_exit(); \
do { a; } while (0); \
rcu_idle_enter(); \
}
Thanx, Paul
next prev parent reply other threads:[~2012-02-02 23:27 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120202004253.GA10946@linux.vnet.ibm.com>
[not found] ` <1328143404-11038-1-git-send-email-paulmck@linux.vnet.ibm.com>
2012-02-02 0:43 ` [PATCH RFC idle 2/3] arm: Avoid invoking RCU when CPU is idle Paul E. McKenney
2012-02-02 2:48 ` Rob Herring
2012-02-02 4:40 ` Paul E. McKenney
2012-02-02 3:49 ` Nicolas Pitre
2012-02-02 4:44 ` Paul E. McKenney
2012-02-02 17:13 ` Nicolas Pitre
2012-02-02 17:43 ` Paul E. McKenney
2012-02-02 18:31 ` Nicolas Pitre
2012-02-02 19:07 ` Paul E. McKenney
2012-02-02 22:20 ` Kevin Hilman
2012-02-02 22:49 ` Rob Herring
2012-02-02 23:03 ` Steven Rostedt
2012-02-02 23:27 ` Paul E. McKenney [this message]
2012-02-02 23:51 ` Paul E. McKenney
2012-02-03 2:45 ` Steven Rostedt
2012-02-03 6:04 ` Paul E. McKenney
2012-02-03 18:55 ` Steven Rostedt
2012-02-03 19:40 ` Paul E. McKenney
2012-02-03 20:02 ` Steven Rostedt
2012-02-03 20:23 ` Paul E. McKenney
2012-02-06 21:18 ` [PATCH][RFC] tracing/rcu: Add trace_##name##__rcuidle() static tracepoint for inside rcu_idle_exit() sections Steven Rostedt
2012-02-06 23:38 ` Paul E. McKenney
2012-02-07 12:32 ` Steven Rostedt
2012-02-07 14:11 ` Paul E. McKenney
2012-02-08 13:57 ` Frederic Weisbecker
2012-02-07 14:40 ` Josh Triplett
[not found] ` <20120206220502.GA21340@leaf>
2012-02-07 0:36 ` Steven Rostedt
[not found] ` <20120203025350.GF13456@leaf>
2012-02-03 6:06 ` [PATCH RFC idle 2/3] arm: Avoid invoking RCU when CPU is idle Paul E. McKenney
2012-02-02 23:39 ` Rob Herring
2012-02-03 18:41 ` Kevin Hilman
2012-02-03 19:26 ` Paul E. McKenney
2012-02-03 19:36 ` Steven Rostedt
2012-02-04 14:21 ` Paul E. McKenney
2012-02-06 19:32 ` Steven Rostedt
2012-02-02 23:03 ` Paul E. McKenney
2012-02-03 19:12 ` Kevin Hilman
2012-02-03 19:26 ` Paul E. McKenney
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