Messages in this thread | | | Date | Mon, 8 Sep 2008 08:09:48 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [BUG] x86 kenel won't boot under Virtual PC |
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On Sun, 7 Sep 2008, H. Peter Anvin wrote: > > Under that logic we shouldn't even have CPU configurables, since you want it > to "just work" whatever crap you're running on. That is EXACTLY what > CONFIG_X86_GENERIC means
I dunno.. Event he help-text doesn't actually agree with that:
config X86_GENERIC bool "Generic x86 support" depends on X86_32 help Instead of just including optimizations for the selected x86 variant (e.g. PII, Crusoe or Athlon), include some more generic optimizations as well. This will make the kernel perform better on x86 CPUs other than that selected.
This is really intended for distributors who need more generic optimizations.
Also, quite frankly, while the CPU processor type message says
The kernel will not necessarily run on earlier architectures than the one you have chosen, e.g. a Pentium optimized kernel will run on a PPro, but not necessarily on a i486.
I thought you agreed that CPU virtualization can be a problem? That was the whole excuse for why the dynamic code was changed. Why would it not be true for the static code?
The fact is, if you want to run on a Core2 or other modern CPU, then "Virtual PC" is apparently buggy in this respect. You worked around it for the dynamic choice - but that's totally _pointless_ if you then don't want to work around it for the static one.
Linus
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