On Tue, 2002-09-10 at 16:23, Phil Payne wrote: > > This was forwarded to me by a co-worker. It's interesting, and sort of > > echoes IBM's experience with 64-bit Linux on zSeries. IBM mainframes have a > > maximum of 16 processors per box, but they also saw linear scalability when > > running a 2.4 kernel in 64-bit mode. This is very nice verification of > > those results. > > I didn't think Linux supported a 16-way image.
Depends on the architectures. The base x86-32 kernel didn't because it only supported flat APIC addressing until recently. With IBM summit chipsets we should pass that. The generic constraint in the base kernel for 2.4 (though not for 2.5) its bits per unsigned long - so 32 for 32bit , 64 for 64bit. Thats also fixable but more work. SGI have also had Linux running on big origin boxes.
