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Date: Mon, 20 Oct 2008 16:23:57 -0400 From: lsorense@...lub.uwaterloo.ca (Lennart Sorensen) To: Alok Kataria <alokkataria1@...il.com> Cc: Antipov Dmitry <dmantipov@...dex.ru>, linux-kernel@...r.kernel.org, Jordan Crouse <jordan.crouse@....com>, akataria@...are.com Subject: Re: 2.6.27: 0 MHz CPU and wrong system time on AMD Geode system On Fri, Oct 17, 2008 at 03:17:39PM -0700, Alok Kataria wrote: > Can you try the attached debug patch, it puts a printk message and > will let us know what exaclty is failing during the calibration > process. > There were some major changes in the 2.6.27 cycle related to tsc calibration. > Apart from the unification for 32 and 64bit, some checks were added in > the code to make the calibration process more robust, maybe this > specific machine is more prone to SMI's than other, as a result the > checks are a little to harsh for this one. I recently had to disable the timer generating an SMI on our platform, because it would cause FIFO overflows on serial ports and other infrequent problems. SMM/SMI is just a pain in the rear. I haven't tried 2.6.27 yet, but have not had issues with 2.6.26 so far (other than it seemingly breaking the SC1200's ide controller with certain compact flash cards which I am still trying to track down, but that isn't a Geode LX problem, that's a Geode SC1200 problem). -- Len Sorensen -- 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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