linux-kernel - Re: [2.6.18-rc7-mm1] slow boot

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Date:	Thu, 28 Sep 2006 19:00:25 +0200
From:	Tilman Schmidt <tilman@...p.cc>
To:	Andrew Morton <akpm@...l.org>
CC:	linux-kernel@...r.kernel.org, Andy Kleen <ak@...e.de>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [2.6.18-rc7-mm1] slow boot

On 24.09.2006 23:53, Andrew Morton wrote:
> Do you have the time to go through the
> http://www.zip.com.au/~akpm/linux/patches/stuff/bisecting-mm-trees.txt
> process?

Phew, it's done. And the winner is:

x86_64-mm-i386-stacktrace-unwinder.patch
--------8<--------8<--------8<--------8<--------8<--------8<--------
i386: Do stacktracer conversion too

Following x86-64 patches. Reuses code from them in fact.

Convert the standard backtracer to do all output using
callbacks.   Use the x86-64 stack tracer implementation
that uses these callbacks to implement the stacktrace interface.

This allows to use the new dwarf2 unwinder for stacktrace
and get better backtraces.

Cc: mingo@...e.hu

Signed-off-by: Andi Kleen <ak@...e.de>
-------->8-------->8-------->8-------->8-------->8-------->8--------

Backing out just this patch from 2.6.18-mm1 (and resolving conflicts
manually the obvious way) gets the boot time back to normal (ie. as
fast as 2.6.18 mainline) on my
Linux gx110 2.6.18-mm1-noinitrd #2 PREEMPT Thu Sep 28 18:48:32 CEST 2006 i686 i686 i386 GNU/Linux
machine.

Thanks
Tilman

-- 
Tilman Schmidt                          E-Mail: tilman@...p.cc
Bonn, Germany
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