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SubjectRe: new IRQ scalability changes in 2.3.48
On Sun, Mar 19, 2000 at 10:28:14AM -0800, Linus Torvalds wrote:
>
>
> On Sun, 19 Mar 2000, Rogier Wolff wrote:
> >
> > How about making "preemptive kernel" a "default-on" option on 2.4pre
> > and a "default-off" option on the real 2.4 kernel?
>
> No, it's definitely too experimental - there are places that play games
> with the irq state etc, so there can be things that need quite a lot of
> debugging to get the threaded-UP case working fine.
>
> Maybe during 2.5.x we can back-port the changes to a 2.4.x release, and
> give people a three-way choice: UP, threaded-UP or SMP. But it's not a
> 2.4.x development thing.
>
> Linus


Does this mean that we are going to have yet another permutation of
the binary interface? (Not that I personally really mind, although I
can see that it would be convenient to export certain inlined functions
that are different between UP and SMP (and RTLinux).)



dave...


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