Messages in this thread | | | Date | Sat, 2 May 1998 23:08:35 +1000 | From | Richard Gooch <> | Subject | Re: Kernel 2.1.99 panics at boot |
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Adam J. Richter writes: > In article <199805011910.VAA26782@d250-hrz.uni-duisburg.de> you write: > >Greetings, > > > > 2.1.99 panics at bootup on my system with: > [...] > >CONFIG_M586=y > [...] > >CONFIG_MTRR=y > [...] > > The new Memory Type Range Register (MTRR) support in 2.1.99 > crashes all non-686 machines compiled when the kernel is compiled with > SMP=1 defined (the default), due to a misplaced ifdef in the > mtrr_init() routine in arch/i386/kernel_mtrr.c. From your choice of
Actually, there was an earlier bug with non-MTRR CPUs with SMP kernels which I fixed a week ago, but that only fixed it for Pentium CPUs. The bug in 2.1.99 only appears to affect non-Pentium/PPro/PII CPUs (well, known to be a bug with Cyrix 6x86).
> CPU in the kernel configuration, I am guessing that you are running on > an non-i686 processor. Apply Richard Gooch's mtrr-v1.19 patch against > pristine 2.1.99 that he posted to this list earlier today or simply > reconfigure the kernel to build without MTRR. From the documentation, > it appears that MTRR is a feature found only on i686 CPU's anyhow.
Someone told me that the Cyrix 6x86 has something similar, so in theory all I need is for someone to send me some Cyrix-specific register setting code, and I can integrate it. I expect the /proc/mtrr interface doesn't need to change.
Regards,
Richard....
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