Messages in this thread | | | Date | Tue, 18 Dec 2007 15:43:52 +0000 | From | Pavel Machek <> | Subject | Re: [PATCH] Option to disable AMD C1E (allows dynticks to work) |
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On Fri 2007-12-14 00:47:10, Eduard-Gabriel Munteanu wrote: > Some multiprocessor 64-bit AMD systems don't allow the user to disable > the C1E C-state. The kernel detects C1E and marks the LAPIC as > broken, thereby disabling dynticks. This patch adds an option to > disable C1E when detected. It also allows the user to enable this > processor feature even if that means disabling dynticks, which is > useful in case C1E might provide better power savings (e.g.: C-states > beyond C1 don't work). Tested on a Turion X2 TL-56 laptop. Thanks to > Mikhail Kshevetskiy and FreeBSD for pointing out the relevant AMD docs. ...
> +static int __cpuinit force_amd_c1e(char *str) {
{ on new line, please.
> + disable_amd_c1e = 0; > + return 1; > +} -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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