linux-kernel - Re: [PATCH 2/2] nohz: Add basic tracing

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Message-ID: <0000013e38188092-7e0b72ea-9ae0-417c-902a-5e8a88282073-000000@email.amazonses.com>
Date:	Tue, 23 Apr 2013 18:12:10 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Chris Metcalf <cmetcalf@...era.com>,
	Geoff Levand <geoff@...radead.org>,
	Gilad Ben Yossef <gilad@...yossef.com>,
	Hakan Akkan <hakanakkan@...il.com>,
	Kevin Hilman <khilman@...aro.org>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 2/2] nohz: Add basic tracing


On Mon, 22 Apr 2013, Frederic Weisbecker wrote:

> It's not obvious to find out why the full dynticks subsystem
> doesn't always stop the tick: whether this is due to kthreads,
> posix timers, perf events, etc...
>
> These new tracepoints are here to help the user diagnose
> the failures and test this feature.

Very good. This will help a lot.

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