Re: 2.4.0-test9 + Winchip2/2A processor family == hang on boot

From: Jamie Lokier (
Date: Thu Oct 12 2000 - 08:30:50 EST wrote:
> > Sounds like you got caught by the conditional move instruction that is
> > generated for 686. It causes oops on 586, and somewhere in the oops or
> > printk code you hit another cmove. Double fault, kernel hang.
> Ah yes, it all comes back to me now :)
> Also explains why my printk's weren't working during tests.
> I'm amazed it took this long for someone to notice. :)
> I'll have to start running devel kernels on all the
> funky hardware like Winchip. Mine has been running 2.2
> (where this isn't an issue) for a long time.

Maybe it wouldn't be a bad idea to emulate cmov specifically so this
sort of thing generates a reasonable diagnostic. cmov is a very simple
instruction, very easy to emulate.

-- Jamie
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