Messages in this thread | | | Date | Mon, 9 Mar 1998 11:35:26 +0000 (GMT/BST) | From | Mike Jagdis <> | Subject | Re: [PATCH] Cyrix setup |
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On Mon, 9 Mar 1998, Alan Cox wrote:
> If you do HLT-on-idle make sure you handle it with the nohlt option at > boot properly so you can nohlt a Cyrix
It has always worked like that. The suspend on halt Cyrix setting simply tells the CPU to go into low power mode when a hlt instruction is executed rather than spinning in power sucking mode. The nohlt Linux boot option controls whether or not the hlt instruction is executed when the system is idle.
i.e. the kernel *already* assumes that the hlt instruction will benefit the idle loop by putting the CPU into a low power mode and *already* provides a means of disabling use of hlt for those systems that can't recover from such a state correctly (it's a problem for some Intel based systems too).
Not setting the Cyrix to go low power on hlt breaks the existing assumptions in a way that is just plain *dumb*!
Mike
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