Messages in this thread | | | Date | Fri, 09 Jan 2009 11:13:30 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [patch] measurements, numbers about CONFIG_OPTIMIZE_INLINING=y impact |
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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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