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SubjectRe: [PATCH] Re: UNWIND_INFO slowdown in -mm1

* Jan Beulich <jbeulich@novell.com> wrote:

> >in 2.6.18-mm1 we are seeing _really_ long delays in the unwind code.
> >(full trace attached) On an Athlon64 3800+ CPU:
>
> Below patch should help, can you try it out? Short of the linker
> supporting building a binary lookup table at build time, it creates
> one as soon as the bootmem allocator is usable (so you'll continue
> using the linear lookup for the first [hopefully] few calls). The code
> should be ready to utilize a build-time created table once a fixed
> linker becomes available.

i tried this ontop of -git and it builds and boots fine, and the bootup
speed problems seem to be gone. Thanks!

> Signed-off-by: Jan Beulich <jbeulich@novell.com>

Acked-by: Ingo Molnar <mingo@elte.hu>

Ingo
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