linux-kernel - Re: [PATCHv2 0/2] oprofile, x86: allow backtrace for 32bit apps under 64bit kernel

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Message-ID: <20101001150303.GD13563@erda.amd.com>
Date:	Fri, 1 Oct 2010 17:03:04 +0200
From:	Robert Richter <robert.richter@....com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"oprofile-list@...ts.sourceforge.net" 
	<oprofile-list@...ts.sourceforge.net>,
	"oleg@...hat.com" <oleg@...hat.com>
Subject: Re: [PATCHv2 0/2] oprofile, x86: allow backtrace for 32bit apps
 under 64bit kernel

On 29.09.10 10:46:45, Jiri Olsa wrote:
> I'm sending reworked version of the support for backtrace of ia32
> applications under 64bit kernels.
> 
> updates are based on comments by Robert Richter
> 
> v2:
> 	- using struct stack_frame for 64bit processes
> 	- using struct stack_frame_ia32 for compat processes
> 	- added inline function x86_backtrace_32 which is
> 	  just empty stub for !CONFIG_COMPAT
> 	- I did not figure out a smart way to share dump code between
> 	  32 and 64 bits. I'm currently under impression the code is
> 	  so far easy and light enough to live separately and mixing
> 	  the code would come with more complexity.
> 
> 
> attached patches:
> - 1/2 using struct stack_frame for 64bit processes dump
> - 2/2 adding backtrace dump for 32bit process in compat mode
> 
> please let me know what you think
> 
> thanks,
> jirka
> ---
>  arch/x86/oprofile/backtrace.c |   70 ++++++++++++++++++++++++++++++++++------
>  1 files changed, 59 insertions(+), 11 deletions(-)

Applied to oprofile/core. Thanks Jirka.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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