linux-kernel - Re: [PATCH 2/2] x86/tbl/trace: Do not trace on CPU that is offline

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Message-ID: <CA+icZUX+3nsostkVaOEBbOuXDaaXA2sQJaeZ+xS7LXjyieeHvA@mail.gmail.com>
Date:	Sat, 7 Feb 2015 09:13:23 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>, Dave Hansen <dave@...1.net>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-next <linux-next@...r.kernel.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] x86/tbl/trace: Do not trace on CPU that is offline

On Sat, Feb 7, 2015 at 5:02 AM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Fri, 6 Feb 2015 15:27:54 -0800
> "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
>
>> > Reported-by: Sedat Dilek <sedat.dilek@...il.com>
>> > Suggested-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
>> > Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
>>
>> Acked-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
>
> Both patches survived all my tests, now I just need an ack by from Dave
> and/or Peter, and I'll push it off to Linus.
>

I fell over this w/o having any experiences in using the tracing
system within the Linux-kernel.
Can you give a brief introduction?
Or can describe how you made your tests?
Did you use trace-cmd in your tests?

Thanks.

- Sedat -

[1] http://git.kernel.org/cgit/linux/kernel/git/rostedt/trace-cmd.git/
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