linux-kernel - Re: (BUG?) round_jiffies() is non-monotonic on SMP

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Date:	Sat, 1 Nov 2008 22:36:30 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Arjan van de Ven <arjan@...radead.org>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: (BUG?) round_jiffies() is non-monotonic on SMP

On Sat, 1 Nov 2008, Arjan van de Ven wrote:

> > Come to think of it, is there any good reason why round_jiffies()  
> > doesn't always round up?  It seems a lot safer.
> 
> at the time folks had concerns about making a big error in that
> direction...

All right then.  Would it be preferable to add a new round_jiffies_up() 
routine, or to change round_jiffies() so that it never rounds down?

Alan Stern

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