* Peter Zijlstra <pet...@infradead.org> wrote:
> On Tue, Oct 15, 2013 at 02:25:22PM +0200, Ingo Molnar wrote:
> >
> > Really, please make it _symmetric_ ...
> >
> > Single core systems are becoming a historic curiosity, should we
> > should justify every piece of extra complexity we add for them.
> >
> > So I'd rather see obvious SMP code where the UP case works fine too,
> > and _then_ maybe check a separate patch that adds the UP optimization,
> > with (object size) numbers proving that it's worth it, etc.
>
> That's a slightly larger task than it appears; the core scheduler code
> they rely on with smp doesn't exist on up.
>
> We can do this but we need to do it scheduler wide.
The scheduler has over 800 #ifdefs or similar preprocessor directives:
comet:~/tip> git grep '^#' kernel/sched/ | grep -v include | wc -l
855
I'd like to see this simplified a bit, _especially_ before we add new
complexity ...
Thanks,
Ingo
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