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Subject: Re: NS Geode: Is it OK to enable TSC [2.4.x]
To: HEtheron@csir.co.za (Herman Theron)
Date: Thu, 14 Feb 2002 15:17:49 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <sc6be105.019@CS-IMO.CSIR.CO.ZA> from "Herman Theron" at Feb 14, 2002 04:08:20 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> Normallly, you can only compile the kernel with the CONFIG_M586 option.
> Doing some experimentation, I enabled the TSC in the file:
> /usr/src/linux/arch/i386/kernel/setup.c (by commenting out the
> "clear_bit(X86_FEATURE_TSC...." for the GX processor in the function
> "init_cyrix". I then compiled the kernel then with CONFIG_M586MMX. So
> far the system is running non-stop (without any apparent problems) for
> 24 hours with a RTAI-application aswell.

Certain combinations of Geode/MediaGX and chipset fail because of problems
with the emulation of the pc timers. If your machine even boots without
a panic about that or hanging then its not afflicted. Someone sent a work
around for this problem to the kenrel list recently and its on my pile
of things to tidy up and merge.