Re: gcc inlining heuristics was Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning

[Andi Kleen]

> Isn't the ioctl switch stack issue a separate GCC bug?
> 
> It was/is assigning assigning separate space for local variables which

Was -- i think that got fixed in gcc. But again only in newer versions.

> are mutually exclusive. So instead of the stack footprint of the
> function with the switch() being equal to the largest individual stack
> size of all the subfunctions, it's equal to the _sum_ of the stack sizes
> of the subfunctions. Even though it'll never use them all at the same
> time.
> 
> Without that bug, it would have been harmless to inline them all.

True.

-Andi
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