Date: Wed, 01 Aug 2007 20:37:10 -0700 From: Julian Elischer <julian@elischer.org> To: Garrett Cooper <youshi10@u.washington.edu> Cc: ume@freebsd.org, acpi@freebsd.org, freebsd-hackers@freebsd.org, gahr@gahr.ch Subject: Re: [patch] enhance powerd(8) to handle max temperature Message-ID: <46B15166.1070305@elischer.org> In-Reply-To: <46B14EFB.6010207@u.washington.edu> References: <46AE58B5.3080506@gahr.ch> <yge4pjl1i7f.wl%ume@mahoroba.org> <46AE8F78.1060203@root.org> <20070801.211718.1683324313.imp@bsdimp.com> <46B14EFB.6010207@u.washington.edu>
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Garrett Cooper wrote: > M. Warner Losh wrote: >> In message: <46AE8F78.1060203@root.org> >> Nate Lawson <nate@root.org> writes: >> : Hajimu UMEMOTO wrote: >> : >>>>>> On Mon, 30 Jul 2007 23:31:33 +0200 >> : >>>>>> Pietro Cerutti <gahr@gahr.ch> said: >> : > gahr> My patch is really just a first draft that I wrote in order >> to have >> : > gahr> feedbacks on the general idea to implement a temperature >> controlling >> : > gahr> system inside powerd, and doesn't implement hysteresis as >> you noted, and >> : > gahr> your feedback is that it's not a good idea, which I respect. >> : > : > It is rather backward, IMHO. I did implement a passive cooling >> : > feature as an enhancement of powerd(8) like you did, during initial >> : > phases. Then, I implemented it in our kernel as a result. >> : : I'll take a look at your patch. Umemoto-san is right in that you >> really >> : want the kernel to control cooling. What happens if powerd dies/hangs >> : and your system burns up? Passive cooling is often a last resort to >> : keep the system from overheating. >> >> I keep getting the system shutting down on my HP by FreeBSD because >> the temperature exceeds the _CRT value. Maybe there's something wrong >> with my values, since it happens a lot: >> >> hw.acpi.thermal.min_runtime: 0 >> hw.acpi.thermal.polling_rate: 10 >> hw.acpi.thermal.user_override: 0 >> hw.acpi.thermal.tz0.temperature: 0.0C >> hw.acpi.thermal.tz0.active: -1 >> hw.acpi.thermal.tz0.passive_cooling: 1 >> hw.acpi.thermal.tz0.thermal_flags: 0 >> hw.acpi.thermal.tz0._PSV: 90.0C >> hw.acpi.thermal.tz0._HOT: -1 >> hw.acpi.thermal.tz0._CRT: 94.0C >> hw.acpi.thermal.tz0._ACx: 40.0C -1 -1 -1 -1 -1 -1 -1 -1 -1 >> >> Note: temperature is always 0.0C. >> >> What can I do to help my situation, if I really want the kernel doing >> the cooling? >> >> Warner >> > > Wow, something's really wrong with those calculated temperatures. At > that value most of the plastic and weaker circuitry should have fused > together =\. It would be interesting to see what the values are just after booting, or even earlier if you can get the bios to give temperatures (some MBs have that possibility) > -Garrett > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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