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From: Corey Minyard <cminyard@mvista.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Corey Minyard <minyard@acm.org>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	tglx@linutronix.de
Subject: Re: [PATCH RT v2] Fix a lockup in wait_for_completion() and friends
Date: Mon, 1 Jul 2019 15:43:25 -0500	[thread overview]
Message-ID: <20190701204325.GD5041@minyard.net> (raw)
In-Reply-To: <20190701161840.1a53c9e4@gandalf.local.home>

On Mon, Jul 01, 2019 at 04:18:40PM -0400, Steven Rostedt wrote:
> On Mon, 1 Jul 2019 14:09:49 -0500
> Corey Minyard <minyard@acm.org> wrote:
> 
> > On Fri, Jun 28, 2019 at 09:49:03PM -0400, Steven Rostedt wrote:
> > > On Fri, 10 May 2019 12:33:18 +0200
> > > Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote:
> 
> > > 
> > > When I applied this patch to 4.19-rt, I get the following lock up:  
> > 
> > I was unable to reproduce, and I looked at the code and I can't really
> > see a connection between this change and this crash.
> > 
> > Can you reproduce at will?  If so, can you send a testcase?
> > 
> 
> Yes, it wont boot. There is no testcase as I don't even make it to a
> boot prompt. I applied the patch and it crashes, I remove the patch and
> it boots without issue.
> 
> Attached is the full dmesg and the config used. I applied it to
> 
>   ae97a0ba0197fb424008a317b79bebacd6a50213
>   Linux 4.19.56-rt23
> 
> It works fine for 5.0.14-rt9 where it was added.
> 
> -- Steve

I show that patch is already applied at

    1921ea799b7dc561c97185538100271d88ee47db
    sched/completion: Fix a lockup in wait_for_completion()

git describe --contains 1921ea799b7dc561c97185538100271d88ee47db
v4.19.37-rt20~1

So I'm not sure what is going on.

-corey

  parent reply	other threads:[~2019-07-01 20:43 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-09 19:33 [PATCH RT v2] Fix a lockup in wait_for_completion() and friends minyard
2019-05-09 19:51 ` Steven Rostedt
2019-05-10 10:33 ` Sebastian Andrzej Siewior
2019-05-10 12:08   ` Corey Minyard
2019-05-10 12:26     ` Sebastian Andrzej Siewior
2019-06-29  1:49   ` Steven Rostedt
2019-07-01 19:09     ` Corey Minyard
     [not found]       ` <20190701161840.1a53c9e4@gandalf.local.home>
2019-07-01 20:43         ` Corey Minyard [this message]
2019-07-01 21:06           ` Steven Rostedt
2019-07-01 21:13             ` Steven Rostedt
2019-07-01 21:28               ` Steven Rostedt
2019-07-01 21:34                 ` Corey Minyard
2019-07-02  7:04                 ` Kurt Kanzenbach
2019-07-02  8:35                   ` Sebastian Andrzej Siewior
2019-07-02 11:40                     ` Corey Minyard
2019-07-02 11:53                       ` Sebastian Andrzej Siewior
  -- strict thread matches above, loose matches on Subject: below --
2019-05-08 20:57 [PATCH " minyard
2019-05-09 16:19 ` [PATCH RT " Sebastian Andrzej Siewior
2019-05-09 17:46   ` Corey Minyard
2019-05-14  8:43   ` Peter Zijlstra
2019-05-14  9:12     ` Sebastian Andrzej Siewior
2019-05-14 11:35       ` Peter Zijlstra
2019-05-14 15:25         ` Sebastian Andrzej Siewior
2019-05-14 12:13       ` Corey Minyard
2019-05-14 15:36         ` Sebastian Andrzej Siewior
2019-05-15 16:22           ` Corey Minyard
2019-06-26 10:35   ` Peter Zijlstra

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