Re: New: SSE2 enabled by default on Celeron (P4 based)
Tue, 1 Apr 2003 17:30:43 +0200
Dave Jones writes:
> On Tue, Apr 01, 2003 at 04:53:57PM +0200, Mikael Pettersson wrote:
> > > Steps to reproduce: Compile kernel choosing *any* Celeron option
> > >
> > > /proc/cpuinfo:-
> > > processor : 0
> > > vendor_id : GenuineIntel
> > > cpu family : 6
> > > model : 11
> > This is NOT a P4-based Celeron. It's a P6 Tualatin Celeron, and as such,
> > it does not support SSE2.
> > This CPU needs a kernel configured for a Pentium III or less.
> The *any* part of the bug report doesn't make much sense.
> That indicates that we're doing the wrong thing on the Pentium
> III/Celeron option too.
I checked with 2.5.66. I couldn't find any bug. Plain "Celeron" can't
be chosen -- you have to specify processor generation, and SSE2 is
only set if PENTIUM4 is set. Downgrading from a P4 config to PIII
correctly removes SSE2.
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