linux-kernel - Re: Tasks stuck in futex code (in 3.14-rc6)

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Message-ID: <CA+55aFw8wSe-DUtZ8=rjFJzXYmOSsZ0JzS-_jsZKrDai8LZMXw@mail.gmail.com>
Date:	Thu, 20 Mar 2014 12:25:01 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Davidlohr Bueso <davidlohr@...com>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	ppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>
Subject: Re: Tasks stuck in futex code (in 3.14-rc6)

On Thu, Mar 20, 2014 at 12:08 PM, Davidlohr Bueso <davidlohr@...com> wrote:
>
> Oh, it does. This atomics technique was tested at a customer's site and
> ready for upstream.

I'm not worried about the *original* patch. I'm worried about the
incremental one.

Your original patch never applied to my tree - I think it was based on
-mm or something. So I couldn't verify my "let's go back to the
explicit 'waiters'" incremental patch against reverting and
re-applying the original patch.

So I'd like you to re-verify that that incremental patch really is
solid, and does what your original one did.

               Linus
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