linux-kernel - Re: [RFC][PATCH 3/5] sched: Change the ttwu success details

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Message-ID: <1292513415.6803.4604.camel@twins>
Date:	Thu, 16 Dec 2010 16:30:15 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Chris Mason <chris.mason@...cle.com>,
	Frank Rowand <frank.rowand@...sony.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Mike Galbraith <efault@....de>,
	Oleg Nesterov <oleg@...hat.com>, Paul Turner <pjt@...gle.com>,
	Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 3/5] sched: Change the ttwu success details

On Thu, 2010-12-16 at 16:27 +0100, Peter Zijlstra wrote:
> On Thu, 2010-12-16 at 16:23 +0100, Frederic Weisbecker wrote:
> 
> > > -	TP_printk("comm=%s pid=%d prio=%d success=%d target_cpu=%03d",
> > > +	TP_printk("comm=%s pid=%d prio=%d target_cpu=%03d",
> > >  		  __entry->comm, __entry->pid, __entry->prio,
> > > -		  __entry->success, __entry->target_cpu)
> > > +		  __entry->target_cpu)
> > 
> > Note we'll need to fix some perf scripts after that. And also perf sched,
> > probably perf timechart and so on...
> 
> Do any of those actually use the success parameter? If not, then me
> removing it shouldn't break those tools since they're supposed to parse
> the format stuff and not notice it missing ;-)

Alternatively we could always call trace_sched_wakeup() and make success
reflect actual wakeup success.
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