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

[Ingo Molnar]

* Andi Kleen <ak@xxxxxxx> wrote:

> > 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 added the patch now, thanks.
> 
> Not sure this is still .19 material though or better delayed for .20. 
> What do you think?

it's a performance regression that results in 3x boot time slowdown.

	Ingo
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