linux-kernel - Re: 'global' rq->clock

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Message-Id: <20080503.160408.238581868.davem@davemloft.net>
Date:	Sat, 03 May 2008 16:04:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	benh@...nel.crashing.org, a.p.zijlstra@...llo.nl, efault@....de,
	elendil@...net.nl, parag.warudkar@...il.com,
	linux-kernel@...r.kernel.org, guichaz@...oo.fr, andi@...stfloor.org
Subject: Re: 'global' rq->clock

From: Ingo Molnar <mingo@...e.hu>
Date: Sun, 4 May 2008 00:38:44 +0200

> the same bug existed on x86 too: that too does a few IPIs without 
> irq_enter/irq_exit. We now removed the softlockup dependency so it 
> should not be required to do an irq_enter()/exit anymore - unless the 
> code that the IPI uses accesses jiffies. (but that would be unusual)

That move doesn't solve the problem, I'm strongly certain
arch's still need to add the irq_{enter,exit}().

I'll revert the irq_{enter,exit}() changes on one of my
sparc64 boxes to validate this later today.
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