> There are tools already around to do this sort of thing as well -
> "profile directed optimization" or whatever they called it. Seems to be
> fairly commonly done with userspace, but not with the kernel. I'm not
> sure why not ... possibly because it's not available for gcc ?
gcc has this for sure
the problem is that it expects the profile info in a special format
that.. gets written to a file. So to do it in the kernel you need
SomeMagic(tm), for example to use the kernel profiler but to let it
output it somehow in a gcc compatible format.
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