From: Andrew Morton <akpm@linux-foundation.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org,
mingo@elte.hu, tglx@linutronix.de, marcin.slusarz@gmail.com,
linux-kernel@vger.kernel.org, davem@davemloft.net,
rostedt@goodmis.org
Subject: Re: [PATCH] printk: robustify printk
Date: Fri, 8 Aug 2008 13:46:57 -0700 [thread overview]
Message-ID: <20080808134657.fe439e56.akpm@linux-foundation.org> (raw)
In-Reply-To: <1218227859.29098.24.camel@lappy.programming.kicks-ass.net>
On Fri, 08 Aug 2008 22:37:39 +0200
Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> On Fri, 2008-08-08 at 13:32 -0700, Paul E. McKenney wrote:
>
> > How about if I instead add comments warning people not to put printk()
> > in the relevant RCU-implementation code? That way I can be not only lazy,
> > but cowardly as well! ;-)
>
> Well, it does spoil the party a little, we are now trading one deadlock
> for another :-/
>
Yup. We could just as easily put those comments into the scheduler
wakeup code.
Why are we fixing this, btw? The problem has been there forever and
people who hack the wakeup code could/should know about it anyway. All
they need to do is to disable klogd during development. Did the
problem recently become worse for some reason?
next prev parent reply other threads:[~2008-08-08 20:52 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-24 12:24 [PATCH 0/2] printk vs rq->lock and xtime lock Peter Zijlstra
2008-03-24 12:24 ` [PATCH 1/2] printk_nowakeup() Peter Zijlstra
2008-03-24 12:24 ` [PATCH 2/2] time: xtime lock vs printk Peter Zijlstra
2008-03-24 14:21 ` Daniel Walker
2008-03-24 14:31 ` [PATCH 0/2] printk vs rq->lock and xtime lock Marcin Slusarz
2008-03-24 17:58 ` Linus Torvalds
2008-03-24 18:15 ` Peter Zijlstra
2008-03-24 18:57 ` Andrew Morton
2008-08-08 13:30 ` Peter Zijlstra
2008-08-08 13:46 ` Peter Zijlstra
2008-08-08 16:41 ` Linus Torvalds
2008-08-08 17:10 ` Peter Zijlstra
2008-08-08 17:25 ` Linus Torvalds
2008-08-08 17:40 ` Peter Zijlstra
2008-08-08 17:48 ` Linus Torvalds
2008-08-08 18:14 ` [PATCH] printk: robustify printk Peter Zijlstra
2008-08-08 18:30 ` Linus Torvalds
2008-08-08 18:33 ` Peter Zijlstra
2008-08-08 19:14 ` Andrew Morton
2008-08-08 19:21 ` Peter Zijlstra
2008-08-08 19:37 ` Andrew Morton
2008-08-08 19:49 ` Peter Zijlstra
2008-08-08 20:32 ` Paul E. McKenney
2008-08-08 20:37 ` Peter Zijlstra
2008-08-08 20:46 ` Andrew Morton [this message]
2008-08-08 20:57 ` Linus Torvalds
2008-08-08 21:13 ` Andrew Morton
2008-08-08 20:50 ` Steven Rostedt
2008-08-08 19:47 ` Peter Zijlstra
2008-08-11 10:45 ` Ingo Molnar
2008-08-11 11:03 ` Andi Kleen
2008-08-11 11:22 ` Peter Zijlstra
2008-08-11 11:42 ` Andi Kleen
2008-08-11 14:15 ` Valdis.Kletnieks
2008-08-11 14:29 ` Andi Kleen
2008-08-11 14:55 ` Steven Rostedt
2008-08-11 12:02 ` Ingo Molnar
2008-08-11 12:14 ` Andi Kleen
2008-08-11 11:04 ` Peter Zijlstra
2008-08-11 11:51 ` Ingo Molnar
2008-08-11 12:36 ` Ingo Molnar
2008-08-20 12:40 ` Jiri Kosina
2008-08-20 12:43 ` Peter Zijlstra
2008-08-20 13:40 ` Ingo Molnar
2008-08-11 16:09 ` Paul E. McKenney
2008-08-11 13:22 ` Paul E. McKenney
2008-08-08 20:30 ` Paul E. McKenney
2008-08-08 20:20 ` Paul E. McKenney
2008-08-08 21:35 ` Andi Kleen
2008-08-08 23:02 ` David Miller
2008-08-09 0:18 ` Paul E. McKenney
2008-08-08 17:52 ` [PATCH 0/2] printk vs rq->lock and xtime lock Steven Rostedt
2008-03-24 18:16 ` Linus Torvalds
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