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* Daniel Walker <dwalker@mvista.com> wrote: > On Sat, 2006-09-09 at 07:12 +0200, Ingo Molnar wrote: > > > The real solution would be to use gcc -ffunction-sections plus ld > > --gc-sections to automatically get rid of unused global functions, at > > link time. I'm wondering how hard it would be to enhance kbuild to do > > that - x86_64 already uses -ffunction-sections (if CONFIG_REORDER), so > > the big question is how usable is ld --gc-sections. Such a feature would > > be quite important for embedded systems (and for RAM footprint in > > general) as it would save a significant amount of .text and .data. > > A patch to do this was submitted already by Marcelo Tosatti .. > > http://lkml.org/lkml/2006/6/4/169 ah, i missed that patch in the June lock validator frenzy. The results are astounding: >> vmlinux shrinks from 1090389 to 983933 bytes, or 106k (~= 10%). Andrew, Linus, Kai, Sam: a must-have feature! This saves more kernel kernel image RAM than all the other kernel shrinking efforts of the past 2 years combined - at zero cost. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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