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Message-Id: <1240345936.6080.6.camel@localhost> Date: Tue, 21 Apr 2009 13:32:16 -0700 From: john stultz <johnstul@...ibm.com> To: Ingo Molnar <mingo@...e.hu> Cc: Jon Hunter <jon-hunter@...com>, Thomas Gleixner <tglx@...utronix.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [RFC][PATCH] Dynamic Tick: Allow 32-bit machines to sleep for more than 2.15 seconds On Tue, 2009-04-21 at 08:35 +0200, Ingo Molnar wrote: > * Jon Hunter <jon-hunter@...com> wrote: > > Anyway, making this change has allowed my 32-bit machine to sleep > > for longer than ~2.15 seconds and thought this could be of > > interest to others. Your comments/feedback would be appreciated. > > > Looks like a good thing at first sight. Thomas, John, what do you > think? The concern is many clocksources wrap after a handful of seconds. The acpi_pm is the best example (its only 24 bits wide). I brought this issue up earlier, and provided some example code that could be used to limit the idle time appropriately for the current clocksource here: http://lkml.indiana.edu/hypermail/linux/kernel/0901.3/02693.html Jon: Did you see that mail, or is there a reason you didn't adapt this code into your patch? thanks -john -- 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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