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Date:	Sat, 18 Oct 2014 18:15:29 +0200
From:	Mike Galbraith <>
To:	Linus Torvalds <>
Cc:	Catalin Marinas <>,
	Linux Kernel Mailing List <>,
	Matteo Franchin <>,
	Davidlohr Bueso <>,
	Darren Hart <>,
	Thomas Gleixner <>,
	Peter Zijlstra <>,
	Ingo Molnar <>,
	"Paul E. McKenney" <>
Subject: Re: [PATCH] futex: Ensure get_futex_key_refs() always implies a

On Sat, 2014-10-18 at 08:28 -0700, Linus Torvalds wrote: 
> On Fri, Oct 17, 2014 at 11:54 PM, Mike Galbraith
> <> wrote:
> >
> > The barrier fixing up my problematic box smells a lot like evidence.
> Is this a "tested-by"? Did you actuallyu verify that the patch ends up
> fixing the problem you saw?

Yup, it definitely fixed it up.

Weird that it didn't show at all on the 2 socket 20 core box the problem
I was looking into was reported on, but was 100% busted on the similar 2
socket 28 core box I borrowed to have a peek, and only that box.  My
(crippled/slow) 64 core DL980 was perfectly happy, as were my 3 home
boxen, not a peep from anywhere but that one 28 core box.

Hohum..  Tested-by: Mike Galbraith <>


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