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Date: Wed, 17 Dec 2014 18:14:04 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Mel Gorman <mgorman@suse.de>, Thomas Gleixner <tglx@linutronix.de>,
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        Frederic Weisbecker <fweisbec@gmail.com>,
        Don Zickus <dzickus@redhat.com>, Dave Jones <davej@redhat.com>,
        the arch/x86 maintainers <x86@kernel.org>
Subject: Re: frequent lockups in 3.18rc4
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On Wed, Dec 17, 2014 at 12:01:39PM -0500, Konrad Rzeszutek Wilk wrote:
> > Linus, do you have a pointer to whatever version of the patch you tried?
> 
> The patch was this:
> 
> a) http://article.gmane.org/gmane.linux.kernel/1835331
> 
> Then Jurgen had a patch:
> https://lkml.kernel.org/g/CA+55aFxSRujj=cM1NkXYvxmo=Y1hb1e3tgLhdh1JDphzV6WKRw@mail.gmail.com
> which was one fix for one bug that ended up being fixed in QEMU - so
> it can be ignored.
> 
> But my understanding of that thread was that it said patch 'a)' did not
> fix Dave's issues - and the conversation went off on NMI watchdog?
> 
> I will look up the giant thread to make sense.

No, you're right in that the patch didn't solve the issue at hand and
that the conversation moved on into a different direction.

But I would very much like to see it (or something very much like it)
happen, because it does make the code much saner.