linux-kernel - Re: [PATCH] tracing/ftrace: add missing wake-up on some callsites

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Date:	Mon, 23 Feb 2009 11:51:30 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH] tracing/ftrace: add missing wake-up on some callsites


On Mon, 23 Feb 2009, Frederic Weisbecker wrote:
> > 
> > Perhaps we could add these callsites back, but we would need to update 
> > trace_wake_up.
> > 
> > Have trace_wake_up set a flag instead, and add a tracepoint around the 
> > scheduler (outside the grabbing of runqueue locks), that will have a 
> > callback to the tracing code. That call back can perform the wakeups.
> > 
> > How does that sound?
> 
> 
> That sounds good but only for these particular tracers I guess.

OK, what about making a trace_delay_wake_up()?

-- Steve

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