Re: [PATCH] bitops: simplify generic bit finding functions

[Andi Kleen]

Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> writes:
>
> Is there a real hot path anywhere that actually uses this and depends on 
> it?

A long time ago during profiling I found that in the scheduler back then
for_each_cpu() with find_next_bit() was somewhat hot. But I'm not sure it 
still would be in the new scheduler anyways and the test case a little
dumb anyways (overscheduling user space)

Still I think for_each_cpu() should be reasonably stream lined code.

-Andi
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