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

[Ingo Molnar]

* Jan Beulich <jbeulich@xxxxxxxxxx> 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@xxxxxxxxxx>

Acked-by: Ingo Molnar <mingo@xxxxxxx>

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/