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

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Message-Id: <20080503.122734.01023096.davem@davemloft.net>
Date:	Sat, 03 May 2008 12:27:34 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	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: Sat, 3 May 2008 12:10:16 +0200

> ( although please note that the growing generalization that goes on
>   _did_ find a subtle nohz problem on sparc64 early in the merge window,
>   so it's not like these changes are totally useless to you. )

Note that this bug theoretically exists on every platform,
even x86, and only sparc64 is fixed at the moment by adding
the irq_{entry,exit}() guards around all of it's IPI handlers.

Just a reminder.
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