From: Thomas Gleixner <tglx@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Chase Douglas <chase.douglas@canonical.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Randy Dunlap <randy.dunlap@oracle.com>
Subject: Re: [PATCH 3/3] Stop tracing on a schedule bug
Date: Fri, 16 Apr 2010 21:58:05 +0200 (CEST) [thread overview]
Message-ID: <alpine.LFD.2.00.1004162155220.3625@localhost.localdomain> (raw)
In-Reply-To: <1271436413.1934.5.camel@localhost>
Steven,
On Fri, 16 Apr 2010, Steven Rostedt wrote:
> On Thu, 2010-04-15 at 21:01 -0700, Chase Douglas wrote:
>
> > > 2) tracing off can be done via filters on functions and/or events
> > > already - so I doubt that the tracing_off_event(level) is necessary
> > > at all.
> > >
> > > schedule_bug() definitely deserves a separate trace_schedule_bug()
> > > event which can be used to stop the tracer by already existing
> > > functionality.
> >
> > Steven said he would be fine with a separate TRACE_EVENT_<blah> macro
> > for the schedule bug if needed, but I'm not sure we need to go that
> > far. If it's configurable through debugfs at run time then it serves
> > my purpose. Unless you feel we should have finer grained control
> > specifically for scheduling while atomic bugs, I'll just leave it as
> > TRACE_EVENT_WARN.
>
> I actually like Thomas's idea better. I need to add the "stop trace on
> event" functionality, and we can insert trace events for bugs, and not
I just assumed that it would work for events already. The stop trace on
function filter works perfect and is a very conveniant tool.
> have this whole "stop tracing here" functions. Instead we could just add
> tracepoints and have a way to pick and choose where to stop tracing.
>
> add a:
>
> include/trace/events/errors.h
>
> #define TRACE_SYSTEM errors
>
> TRACE_EVENT(sched_bug, ....)
>
> etc,
>
>
> When I get back home, I'll add this functionality to stop tracing on
> events. Perhaps I'll even add "TRACE_SUB_SYSTEM" so in the events
> directory, we can have sub layers:
>
> events/errors/BUG/...
> events/errors/WARNING/...
I like that idea. That's solving the problem in a very elegant way.
Thanks,
tglx
next prev parent reply other threads:[~2010-04-16 19:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-14 16:20 [PATCH 1/3 v4] Add tracing_off_event() to stop tracing when a bug or warning occur Chase Douglas
2010-04-14 16:20 ` [PATCH 2/3] Add tracing_off_event() calls to BUG() and WARN() paths Chase Douglas
2010-04-15 20:57 ` Frederic Weisbecker
2010-04-15 21:49 ` Chase Douglas
2010-04-15 23:15 ` Frederic Weisbecker
2010-04-16 4:13 ` Chase Douglas
2010-04-14 16:20 ` [PATCH 3/3] Stop tracing on a schedule bug Chase Douglas
2010-04-15 21:03 ` Frederic Weisbecker
2010-04-15 21:45 ` Chase Douglas
2010-04-15 23:01 ` Thomas Gleixner
2010-04-15 23:10 ` Frederic Weisbecker
2010-04-15 23:27 ` Chase Douglas
2010-04-15 23:50 ` Thomas Gleixner
2010-04-16 0:21 ` Thomas Gleixner
2010-04-16 1:49 ` Frederic Weisbecker
2010-04-16 16:41 ` Steven Rostedt
2010-04-16 4:01 ` Chase Douglas
2010-04-16 16:46 ` Steven Rostedt
2010-04-16 17:14 ` Chase Douglas
2010-04-16 18:14 ` Frederic Weisbecker
2010-04-16 19:58 ` Thomas Gleixner [this message]
2010-04-19 22:30 ` Chase Douglas
2010-04-16 3:52 ` Chase Douglas
2010-04-15 20:13 ` [PATCH 1/3 v4] Add tracing_off_event() to stop tracing when a bug or warning occur Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2010-03-18 13:48 [PATCH 1/3] " Chase Douglas
2010-03-18 13:48 ` [PATCH 3/3] Stop tracing on a schedule bug Chase Douglas
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