Messages in this thread | | | Date | Sat, 03 May 2008 12:56:16 -0700 | From | "H. Peter Anvin" <> | Subject | Re: i387/FPU init issues... |
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Ingo Molnar wrote: > * H. Peter Anvin <hpa@zytor.com> wrote: > >>> This might also be caused by a calibration error. We've seen enough >>> of them already. >> No doubt. However, there is *something* ugly going on. > > i think a vital clue can be found in the original report: > > | I am able to reproduce the issue consistently on my laptop using qemu > | (which helped speed debugging a bit). I have also narrowed it down to > | include/asm-x86/i387.h::__save_init_fpu in (32 bit version) - it dies > | somewhere in calling the following line: > > so it might just be incorrect Qemu emulation of a PII's NOP instruction? > > (which btw. probably proves that Linux is the first OS to make > intelligent use of those instructions?) >
Ah, yes, this is a Qemu bug, then.
And yes, it probably does mean exactly that :)
-hpa
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