linux-kernel - Re: [ANNOUNCE] v4.11.5-rt1

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Date:   Mon, 19 Jun 2017 18:29:44 +0200
From:   Mike Galbraith <efault@....de>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: Re: [ANNOUNCE] v4.11.5-rt1

On Mon, 2017-06-19 at 10:41 -0400, Steven Rostedt wrote:
> On Mon, 19 Jun 2017 16:13:41 +0200
> Sebastian Andrzej Siewior <bigeasy@...utronix.de> wrote:
> 
> 
> > > Hmm, it shouldn't affect futexes, as it's only called by rtmutex when
> > > waiter->savestate is true. And that should always be false for futex.  
> > 
> > you still have sleeping locks like the hb-lock (which might matter in
> > case the task blocks on the lock and does not continue for some reason).
> 
> But then I'd expect this to be an issue with any spinlock in the kernel.

Thing to do is set a trap for the bugger.  I'll give that a go after I
get some beans/biscuits work done.  For the nonce, what I've reported
is all I know.

	-Mike