linux-kernel - Re: Linux 2.6.32-rc1

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Message-ID: <20090930193533.GA16896@elte.hu>
Date:	Wed, 30 Sep 2009 21:35:33 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <johnstul@...ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: Linux 2.6.32-rc1


* Ingo Molnar <mingo@...e.hu> wrote:

> >  4 files changed, 81 insertions(+), 14 deletions(-)
> >  create mode 100644 arch/x86/lib/cmpxchg8b_emu.S
> 
> The two patches cause hangs on 32-bit, in sched_clock_cpu(). I 
> attached the hang serial log plus the two patches as i applied them.
> 
> Bug in cmpxchg8b_emu()?

... on this CPU we should be using CMPXCHG8B so cmpxchg8b_emu() shouldnt 
be called.

	Ingo
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