From: Frederic Weisbecker <fweisbec@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: [PATCH] tracing/ftrace: add missing wake-up on some callsites
Date: Mon, 23 Feb 2009 18:05:29 +0100 [thread overview]
Message-ID: <20090223170528.GH5961@nowhere> (raw)
In-Reply-To: <alpine.DEB.2.00.0902231151020.18221@gandalf.stny.rr.com>
On Mon, Feb 23, 2009 at 11:51:30AM -0500, Steven Rostedt wrote:
>
> 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()?
Which would send a delayed work to wake up?
> -- Steve
>
next prev parent reply other threads:[~2009-02-23 17:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-22 21:56 [PATCH] tracing/ftrace: add missing wake-up on some callsites Frederic Weisbecker
2009-02-22 22:16 ` Ingo Molnar
2009-02-23 15:37 ` Steven Rostedt
2009-02-23 15:42 ` Steven Rostedt
2009-02-23 16:26 ` Frederic Weisbecker
2009-02-23 16:51 ` Steven Rostedt
2009-02-23 17:05 ` Frederic Weisbecker [this message]
2009-02-23 17:13 ` Steven Rostedt
2009-02-23 17:34 ` Frederic Weisbecker
2009-02-23 17:37 ` Ingo Molnar
2009-02-23 18:03 ` Steven Rostedt
2009-02-23 18:09 ` Ingo Molnar
2009-02-27 17:04 ` Masami Hiramatsu
2009-02-23 16:22 ` Frederic Weisbecker
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