Messages in this thread | | | From | David Lang <> | Date | Sat, 13 Sep 2003 17:10:27 -0700 (PDT) | Subject | Re: RFC: [2.6 patch] better i386 CPU selection |
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On Sun, 14 Sep 2003, Andi Kleen wrote:
> Adrian Bunk <bunk@fs.tum.de> writes: > > > > I don't like the current user interface that says "if you want to > > support both an Athlon and a Pentium 4 in your kernel use the Pentium III > > option. And for better optimization, also check the "generic" option". > > The big issue with your ifdefing of workarounds is that it causes subtle > support problems. A lot of settings for specific CPUs boot and work > fine on other CPUs (possibly with small performance impact, but they're > rarely noticeable without explicit benchmarking). Just when you don't > include the workarounds for the bugs on these other CPUs it will boot and > even run, but fail mysteriously once a month. And that would be a support > nightmare. >
it sounds like a nessasary part of this patch would be to detect the CPU type and complain VERY loudly if it's not one supported by the build.
This is probably a good idea anyway.
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