linux-kernel - Re: [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6)

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Message-ID: <87mwlj1tm7.fsf@sejong.aot.lge.com>
Date:	Tue, 05 Nov 2013 11:15:44 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Hyeoncheol Lee <cheol.lee@....com>,
	Hemant Kumar <hkshaw@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	"zhangwei\(Jovi\)" <jovi.zhangwei@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: [PATCHSET 00/13] tracing/uprobes: Add support for more fetch methods (v6)

On Mon, 4 Nov 2013 17:22:29 +0100, Oleg Nesterov wrote:
> On 11/04, Oleg Nesterov wrote:
>>
>> But in any case, I strongly believe that it doesn't make any sense to
>> rely on tu->inode in get_user_vaddr().
>
> Hmm. But I forgot about the case when you probe the function in libc
> and want to dump the variable in libc...

Right.  Actually that's what I really wanted.

>
> So probably I was wrong and this all needs more thinking. Damn.

:)

> Perhaps we really need to pass @file/offset, but it is not clear what
> we can do with bss/anon-mapping.

The @file/offset should work with bss since data in bss is accessed via
an offset in the program, but still anon-mapping has nothing to do with
it.  Hmm...

Thanks,
Namhyung
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