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Open Source and information security mailing list archives
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Date: Sat, 1 Nov 2008 19:43:57 -0700 From: Arjan van de Ven <arjan@...radead.org> To: Alan Stern <stern@...land.harvard.edu> 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 22:36:30 -0400 (EDT) Alan Stern <stern@...land.harvard.edu> wrote: > 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? I'd prefer the former. But to be honest.. I would even more prefer the use of range timers ;) They're in 2.6.28-rc now ... and more power friendly than rounded timers (although I will readily admit that rounding is just easier) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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