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SubjectRe: TSCs are a no-no on i386
On Wed, 30 Jul 2003, Jan-Benedict Glaw wrote:

> This small patch fixes a long-standing problem for bare i386 CPUs. These
> don't have TSCs and so, a recent 2.4.x kernel will simply halt the

Actually i486 processors and some Pentium-like clones have none, too.

> machine leaving a text like "This CPU has no TSC feature (ie was
> compiled for Pentium+) but I do depend on it".

That only happens if you change existing .config -- it may happen for all
options that are unset instead of being set to "n" -- and it can be worked
around by running `make oldconfig' twice.

> Please apply. Worst to say, even Debian seems to start using i486+
> features (ie. libstdc++5 is SIGILLed on Am386 because there's no
> "lock" insn available)...

You need the change for CONFIG_M486 and CONFIG_M586 as well.

+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+ e-mail:, PGP key available +

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