linux-kernel - Re: cpu_clock() in NMIs

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Message-Id: <20091214.213601.77046339.davem@davemloft.net>
Date:	Mon, 14 Dec 2009 21:36:01 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	peterz@...radead.org
Cc:	mingo@...e.hu, tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: cpu_clock() in NMIs

From: Peter Zijlstra <peterz@...radead.org>
Date: Mon, 14 Dec 2009 20:32:50 +0100

> OK, you convinced me plenty ;-)
> 
> I guess we need some debug code to ensure we don't grow any
> local_irq_save/restore/disable code in NMI paths, and maybe document
> this some place.
> 
> Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>

Ingo and others.  I'd like to get this kernel/sched_clock.c IRQ
disabling patch into Linus's tree and then into -stable because the
fix for sparc64 perf depends upon it.

Thanks.
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