How to check if my kernel driver is leaking memory

[Aruna Hewapathirane]

Please use make menuconfig and press / then search for
DEBUG_KMEMLEAK_EARLY_LOG_SIZE and adjust value then save and exit.

You will find it under Kernel Hacking  -> Memory Debugging -|> Kernel
memory leak detector

Symbol: DEBUG_KMEMLEAK_EARLY_LOG_SIZE
[=]

  │ Type  :
integer

  │ Prompt: Maximum kmemleak early log
entries

  │
Location:

  │     -> Kernel
hacking

  │       -> Memory
Debugging

  │ (3)     -> Kernel memory leak detector (DEBUG_KMEMLEAK
[=n])

  │   Defined at
lib/Kconfig.debug:459

  │   Depends on: DEBUG_KMEMLEAK [=n]





On Thu, Mar 13, 2014 at 1:39 PM, m silverstri <
michael.j.silverstri at gmail.com> wrote:

> Thanks Sankar.
>
> If I just modify .config file to enable CONFIG_DEBUG_KMEMLEAK, how can
> I 'Increase the config option "Maximum kmemleak early log entires"
> value to a sufficiently large number like 1200. The default value of
> 400 may not work correctly in all configurations.'?
>
> On Thu, Mar 13, 2014 at 9:34 AM, Sankar P <sankar.curiosity at gmail.com>
> wrote:
> > 2014-03-10 10:44 GMT+05:30 m silverstri <michael.j.silverstri at gmail.com
> >:
> >> Hi,
> >>
> >> I am developing a kernel driver. What should I test to make sure my
> >> kernel driver is not leaking memory?
> >> 1. under normal operation (when applications open and close my driver
> properly)
> >> 2. in error situation (when application open my driver and then it
> >> crashes without close my driver property)
> >>
> >> How can I find out the memory usage used by my driver? so that I can
> >> monitor it over time.
> >>
> >
> > I have earlier come across a similar situation and kmemleak was very
> helpful.
> >
> > I documented my steps and you may find it useful:
> >
> > http://psankar.blogspot.in/2010/11/detecting-memory-leaks-in-kernel.html
> >
> >
> > --
> > Sankar P
> > http://psankar.blogspot.com
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140313/b97ae9ef/attachment.html