From: Mike Galbraith <bitbucket@online.de>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
rostedt@goodmis.org, tglx@linutronix.de
Subject: Re: [PATCH 1/2] irq_work: allow certain work in hard irq context
Date: Mon, 03 Feb 2014 03:43:19 +0100 [thread overview]
Message-ID: <1391395399.5357.16.camel@marge.simpson.net> (raw)
In-Reply-To: <52EEA643.1010200@linutronix.de>
On Sun, 2014-02-02 at 21:10 +0100, Sebastian Andrzej Siewior wrote:
> So CPU5 & CPU52 were eating 100% CPU doing "nothing" instead of running
> cc1 & objdump right?
Yeah.
> According to the backtrace both of them are trying to access the
> per-cpu hrtimer (sched_timer) in order to cancel but they seem to fail
> to get the timer lock here. They shouldn't spin there for minutes, I
> have no idea why they did so…
I dumped it for later-guy.. but he tends to get busy doing other crap,
and just whacks my carefully saved data ;-)
> I guess this problem does not occur without -RT and before that patch
> you saw only that one warning from can_stop_full_tick()?
I didn't try it without -RT, and yes, without, you just get the warning.
-Mike
next prev parent reply other threads:[~2014-02-03 2:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-31 14:34 Sebastian Andrzej Siewior
2014-01-31 14:34 ` [PATCH 2/2] timer: really raise softirq if there is irq_work to do Sebastian Andrzej Siewior
2014-01-31 17:07 ` Steven Rostedt
2014-01-31 17:11 ` Steven Rostedt
2014-01-31 17:42 ` Paul E. McKenney
2014-01-31 17:57 ` Steven Rostedt
2014-01-31 19:03 ` Paul E. McKenney
2014-01-31 19:26 ` Sebastian Andrzej Siewior
2014-01-31 19:34 ` Steven Rostedt
2014-01-31 19:48 ` Sebastian Andrzej Siewior
2014-01-31 19:56 ` Steven Rostedt
2014-01-31 20:05 ` Peter Zijlstra
2014-01-31 20:23 ` Sebastian Andrzej Siewior
2014-01-31 20:29 ` Peter Zijlstra
2014-01-31 19:54 ` Peter Zijlstra
2014-01-31 19:06 ` Sebastian Andrzej Siewior
2014-02-02 4:22 ` [PATCH 1/2] irq_work: allow certain work in hard irq context Mike Galbraith
2014-02-02 20:10 ` Sebastian Andrzej Siewior
2014-02-03 2:43 ` Mike Galbraith [this message]
2014-02-03 4:00 ` Mike Galbraith
2014-02-03 8:31 ` Sebastian Andrzej Siewior
2014-02-03 9:26 ` Mike Galbraith
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