On Tue, 23 Dec 2008 15:39:09 +0100 Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote: > On Mon, Dec 22, 2008 at 08:21:08PM +0100, Manuel Lauss wrote: > > > Add cpu feature override constants for Alchemy. > > > > Code generated for Alchemy does not use all MIPS32r1 features. Add cpu > > feature overrides tailored for Alchemy chips and help GCC create better > > code. As a nice sideeffect the size of the resulting kernel is reduced > > by a few kilobytes (~200kB for a non-modular db1200 devboard build). > > The enormous size difference is probably 99% due to atomic and bitops > which exist in LL/SC and non-LL/SC versions and without the header gcc > will expand the inline function each time. That will hurt, also > performance. Also the big size difference suggests that we may want to > outline some or all of these functions. You are of course correct: text data bss dec hex filename 3890074 124400 436528 4451002 43eaba vmlinux 3890070 124400 436528 4450998 43eab6 vmlinux+mips32r1 3690742 124396 436528 4251666 40e012 vmlinux++llsc 3666386 124332 436528 4227246 4080ae vmlinux+++all -- ml.
