linux-kernel - Re: [RFC][PATCH v2 5/5] mutex: Give spinners a chance to spin_on_owner if need

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Message-ID: <CAGQ1y=72+N4=yjVpjsTKjr-8xSQRS2xw4gcOGOipLgwPwgnA7A@mail.gmail.com>
Date:	Fri, 31 Jan 2014 12:01:37 -0800
From:	Jason Low <jason.low2@...com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Jason Low <jason.low2@...com>, Ingo Molnar <mingo@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Waiman Long <Waiman.Long@...com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Davidlohr Bueso <davidlohr@...com>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>, chegu_vinod@...com
Subject: Re: [RFC][PATCH v2 5/5] mutex: Give spinners a chance to
 spin_on_owner if need_resched() triggered while queued

On Fri, Jan 31, 2014 at 6:09 AM, Peter Zijlstra <peterz@...radead.org> wrote:

> I've downloaded AIM7 from sf.net and I hope I'm running it with 100+
> loads but I'm not entirely sure I got this thing right, its not really
> making progress with or without patch :/

Ingo's program http://lkml.org/lkml/2006/1/8/50 using the V option may
be able to generate similar mutex contention.

Currently still getting soft lockups with the updated version.
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