On Fri, 9 Sep 2005, Andi Kleen wrote:
>
> It won't give more accurate backtraces, not even on i386 because show_stack
> doesn't have any code to follow frame pointers.
Ah, right. I'm using kdb with it. (And my recollection of when
show_stack did have a framepointer version, is that it was hopelessly
broken on interrupt frames, and we're much better off without it.)
> The only reason to use them would be external debuggers, but those
> don't need them on x86-64 neither.
Don't need them, but find them as useful on x86_64 as on i386?
Certainly, I can go on patching in FRAME_POINTERs for x86_64
as I have done, no problem with that. But it seems both bogus
and unhelpful to have that "&& !X86_64" in lib/Kconfig.debug -
framepointers are as helpful/useless on x86_64 as the rest.
Hugh
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