Messages in this thread | | | Date | Sat, 3 May 2008 20:58:34 +0200 | From | Mikael Pettersson <> | Subject | Re: i387/FPU init issues... |
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Thomas Gleixner writes: > On Sat, 3 May 2008, H. Peter Anvin wrote: > > > Thomas Gleixner wrote: > > > > > > Jan, are you sure that P3 knows the P6 NOPs ? AFAICT its P4, but I > > > have to dig up the manuals. > > > > > > > Pentium III is the P6 core, so it will. > > > > Intel explicitly documents "all processors with family 6 or F." > > Yeah, I looked up myself and noticed that I confused those stupid > numbers again. > > Nevertheless reality seems to tell a different story :)
I've tested the "0f 1f 00" 3-byte NOP on two PIIs, a Klamath (family 6 model 3 stepping 4) and a Deschutes (family 6 model 5 stepping 0), and it worked fine on both.
Are you absolutely sure it's this 3-byte NOP that oopses?
I also noticed that jamal's /proc/cpuinfo contains > cpu MHz : 1063.771 which is either wrong or indicates serious overclocking. The PIIs maxed out at about 400/450MHz.
/Mikael
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