Re: [PATCH] 2.5.68 FUTEX support should be optional

Linus Torvalds (torvalds@transmeta.com)
Wed, 14 May 2003 12:50:03 -0700 (PDT)


On Wed, 14 May 2003, Ulrich Drepper wrote:
>
> Current == current development. LinuxThreads is not developed anymore
> and with nptl futexes are mandatory.

Yes, I'm also not very eager to make "core functionality" a config option.
The confusion with the INPUT layer config options was mighty, and none of
it pleasant. And the *BSD's have historically had totally stupid problems
with programs like Wine etc requireing kernel recompiles just because they
made code functionality like vm86 mode or LDT support be a config option.

I don't see the point in dropping futexes except perhaps in a very
controlled embedded environment, but if that is the case, then a PC config
should just force it to "y" and not even ask the user.

We absolutely do NOT want the situation where a program will not work just
because the user forgot some config option that mostly isn't needed.

And futexes _are_ going to be needed. Any sane high-performance threading
implementation _will_ use them. No ifs, buts or maybe's.

Linus

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