From: Tim Bird <tim.bird@am.sony.com>
To: Li Zefan <lizf@cn.fujitsu.com>
Cc: Ryan Wang <openspace.wang@gmail.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Does function_graph support x86_32?
Date: Fri, 19 Mar 2010 20:00:26 -0700 [thread overview]
Message-ID: <4BA43A4A.4060607@am.sony.com> (raw)
In-Reply-To: <4BA17A41.2000303@cn.fujitsu.com>
On 03/17/2010 05:56 PM, Li Zefan wrote:
> Ryan Wang wrote:
>> Does function_graph support x86_32?
>>
>
> Yes, but you need to disable CONFIG_CC_OPTIMIZE_FOR_SIZE
>
> config FUNCTION_GRAPH_TRACER
> bool "Kernel Function Graph Tracer"
> depends on HAVE_FUNCTION_GRAPH_TRACER
> depends on FUNCTION_TRACER
> depends on !X86_32 || !CC_OPTIMIZE_FOR_SIZE
I've been bitten by this numerous times. I most often
use ftrace on ARM, but when I go back to x86, I almost
always go through a sequence of searching for the
function graph tracer in the menus, then realizing it's
completely missing until I disable CC_OPTIMIZE_FOR_SIZE.
Is there any way to have the menu item appear, but be
unsettable unless the SIZE option is disabled? I'm
not a Kconfig guru...
-- Tim
=============================
Tim Bird
Architecture Group Chair, CE Linux Forum
Senior Staff Engineer, Sony Corporation of America
=============================
prev parent reply other threads:[~2010-03-20 3:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-17 14:45 Does function_graph support x86_32? Ryan Wang
2010-03-18 0:56 ` Li Zefan
2010-03-20 3:00 ` Tim Bird [this message]
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