Re: [patch] measurements, numbers about CONFIG_OPTIMIZE_INLINING=yimpact

[H. Peter Anvin]

Richard Guenther wrote:
> > But it's also not inconceivable that gcc adds a -fkernel-inlining or
> > similar that changes the parameters if we ask nicely. I suppose
> > actually such a parameter would be useful for far more programs
> > than the kernel.
>
> I think that the kernel is a perfect target to optimize default -Os behavior for
> (whereas template heavy C++ programs are a target to optimize -O2 for).
> And I think we did a good job in listening to kernel developers if once in
> time they tried to talk to us - GCC 4.3 should be good in compiling the
> kernel with default -Os settings.  We, unfortunately, cannot retroactively
> fix old versions that kernel developers happen to like and still use.

Unfortunately I think there have been a lot of "we can't talk to them" 
on both sides of the kernel-gcc interface, which is incredibly 
unfortunate.  I personally try to at least observe gcc development, 
including monitoring #gcc and knowing enough about gcc internals to 
write a (crappy) port, but I can hardly call myself a gcc expert. 
Still, I am willing to spend some significant time interfacing with 
anyone in the gcc community willing to spend the effort.  I think we can 
do good stuff.

	-hpa
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