linux-kernel - Re: 答复: problem with kmemleak

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Date:	Mon, 16 May 2011 16:58:40 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	ttlxzz ccc <boyzccc@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: 答复: problem with kmemleak

On Mon, May 16, 2011 at 4:53 PM, Catalin Marinas
<catalin.marinas@....com> wrote:
> On Mon, 2011-05-16 at 08:18 +0100, ttlxzz ccc wrote:
>> I'm very glad to find the reason of this problem. It's just because
>> the CONFIG_FRAME_POINTER is not set :).
>>
>> And in dump_stack() which is defined in arch/x86/kernel/dumpstack.c,
>> CONFIG_FRAME_POINTER control whether to get the bp.
>>
>> Now I enable CONFIG_FRAME_POINTER and I can see the full backtrace. :)
>
> It's good you found it. I thought STACKTRACE on x86_64 would set the
> necessary options like FRAME_POINTER so that it works properly. Kmemleak
> only sets STACKTRACE.
>

I am wondering why STACKTRACE doesn't select FRAME_POINTER on x86_64,
which seems necessary...
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