linux-kernel - Re: How to test kernel drivers for memory leaks

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Message-ID: <AANLkTimWzD9350M4RFd+X9JrwiU_HxU9oyKqNjL-wuKZ@mail.gmail.com>
Date:	Wed, 6 Oct 2010 14:14:50 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Elvis Dowson <elvis.dowson@....com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	jason.wessel@...driver.com
Subject: Re: How to test kernel drivers for memory leaks

On Wed, Oct 6, 2010 at 1:13 PM, Elvis Dowson <elvis.dowson@....com> wrote:
>> Kmemleak is an in-kernel memory leak detector. See
>> Documentation/kmemleak.txt for details.
>
> Thanks for that info, I just read it and it looks useful.
>
> Do you know of any other tools that can be used for full static and dynamic analysis, and observations of variables while it is running on the target?
>
> I used to use Rational Test-Real-Time with a JTAG emulator probe before. Are there any other equivalent tools that can do good static and dynamic analysis of kernel modules, while it is running on the target, with a good interface?
>
> I want to setup a full kernel profiling and debug environment, to be able to debug linux kernel (android-2.6.32) running on a TI OMAP 3503 target platform (Gumstix Overo Earth), to optimize performance and improve the stability of the system (e.g. running for more than 1 year, without requiring a reboot).

I have never tried it myself but there's an in-kernel debugger in
mainline these days:

http://kernel.org/pub/linux/kernel/people/jwessel/kdb/

For profiling, I suggest you take a look at tools/perf in the mainline
source tree.

                        Pekka
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