linux-kernel - Re: problem with function

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Message-ID: <alpine.DEB.2.00.0906180000490.6890@gandalf.stny.rr.com>
Date:	Thu, 18 Jun 2009 00:34:03 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jake Edge <jake@....net>
cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: problem with function_graph self-test?


On Wed, 17 Jun 2009, Jake Edge wrote:

> you don't run into this under your "normal" configs?

Doing some google research, I came across this:

 http://www.mail-archive.com/gcc@gcc.gnu.org/msg33101.html

   and 

 http://gcc.gnu.org/ml/gcc-patches/2008-06/msg00025.html

and if I disable OPTIMIZE_FOR_SIZE I get this:

00000420 <timer_stats_update_stats>:
 420:   55                      push   %ebp
 421:   89 e5                   mov    %esp,%ebp
 423:   83 e4 e0                and    $0xffffffe0,%esp

Which gives me the right results. Perhaps we need to make FUNCTION_GRAPH 
depend on !OPTIMIZE_FOR_SIZE, or perhaps if it is only i386 then
 depend on !(OPTIMIZE_FOR_SIZE && X86_32)  :-/


-- Steve
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