Messages in this thread |  | | From | "Tommy Faasen" <> | Subject | Re: SMP processor rework help needed | Date | Mon, 15 Oct 2001 00:09:35 +0200 |
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Yes it would however in my case, the cooler,which I can't get off, is too big for the first slot!
It's just 1 more way linux can be more flexible with hardware. ----- Original Message ----- From: "Gerhard Mack" <gmack@innerfire.net> To: "Andi Kleen" <ak@muc.de> Cc: "Tommy Faasen" <tommy@vuurwerk.nl>; <linux-kernel@vger.kernel.org> Sent: Sunday, October 14, 2001 10:50 PM Subject: Re: SMP processor rework help needed
> On 14 Oct 2001, Andi Kleen wrote: > > > In article <000b01c154ee$1d6a2610$6400a8c0@it0>, > > "Tommy Faasen" <tommy@vuurwerk.nl> writes: > > > Hi, > > > I have this unique situation where cpu 1 has less features (like fxsr) then > > > cpu 0. > > > > I used to have such an AMP machine too: a dual PII-300 with one Katmai and one > > Deschutes. It's technically a violation of the specs; the Intel SMP spec > > requires that the non boot cpus need to have a superset of the features > > of the boot CPU. One CPU died, so it is symmetric now. > > > > For most capabilities it should already work in 2.4 after hpa's cpu > > set rewrite, but FXSAVE is unfortunately a bit of a special case because > > it is used in the scheduler context switch and that is required early > > in the initialization for SMP bootup and changing it would be very > > intrusive. > > > > In the 2.2 SuSE kernel it was fixed instead by adding a new kernel > > command line option nofxsave that overrides the FXSAVE bit on the first > > CPU. That is ok because such setup is very rare and is only generated by > > people who build their own boxes; and these should also know how to pass > > kernel command line arguments. > > This may sound like a dumb question but wouldn't simply swapping the CPUs > have the same affect? > > Gerhard > > > > -- > Gerhard Mack > > gmack@innerfire.net > > <>< As a computer I find your faith in technology amusing. > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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