Re: (patch) SMP Alpha hacks for 2.1.120

Adam C. Powell, IV (adam.powell@nist.gov)
Thu, 03 Sep 1998 13:12:15 -0400


Jeff Garzik wrote:

> The following patch is against 2.1.120-pre3. It resolves several
> problems when compiling with SMP = 1 on Alpha.

Thanks for the post, but I don't think SMP works on Linux-Alpha. Nor on NT. In fact, I was
under the impression that the 21164 can't do SMP with shared memory at all. Do you have a
multi-processor box from DEC? If not, what's the motivation for SMP?

Not to discourage you, but if this is your first time compiling a 2.1 kernel, it's probably not
a good time to try to get full-blown SMP working on a multi-processor alpha box. It took a lot
of very smart people a long time to get it working on Intel machines. I'm waiting for
multi-processor 21264 boards to get reasonable in price (i.e. a year or two from now) before
attempting Alpha Linux SMP- I've heard that chip will make SMP easier. But this is largely
irrelevant future speculation.

Oh, BTW, I had about the same error- the one repeated hundreds of times with every disk access
but otherwise not causing trouble- the first time I compiled a 2.1 kernel when I didn't know to
comment out SMP=1.

Zeen,

-Adam `Cold Fusion' Powell, IV _/\_ http://www.ctcms.nist.gov/~powell/
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