linux-kernel - behavior of hrtimers scheduled to expire in the past

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Date:	Mon, 20 Oct 2008 20:24:38 -0400
From:	"Daniel Rosenthal" <danielrosenthal@....org>
To:	LKML <linux-kernel@...r.kernel.org>, "Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>
Subject: behavior of hrtimers scheduled to expire in the past

What is the intended behavior for an hrtimer that is scheduled to
expire in the past?  I assumed that it would simply be scheduled to
expire at the nearest available time in the future, but I wrote some
scheduler code and it looks like hrtimers don't go off at all if they
are not scheduled to go off at a time which is after rq->clock.  Is
this the intended behavior or is this a bug?

Daniel
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