Message-ID: <1388898334.5342.39.camel@marge.simpson.net>
Subject: Re: [PATCH] Revert "x86: Disable IST stacks for debug/int 3/stack
 fault for PREEMPT_RT"
From: Mike Galbraith <bitbucket@online.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Ben Hutchings <ben@decadent.org.uk>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Steven Rostedt <rostedt@rostedt.homelinux.com>,
        Brian Silverman <bsilver16384@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>, linux-rt-users@vger.kernel.org
Date: Sun, 05 Jan 2014 06:05:34 +0100
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On Sun, 2014-01-05 at 05:45 +0100, Mike Galbraith wrote:

> Or perhaps tell sleeping locks to spin in annoying spots?  I converted
> rt spinlocks globally to preemptible spinning locks (wasn't pretty, but
> worked), so seems that could work.

Bah.  Nope, if lock owner is on your cpu, you have to yield.

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