Re: Probable Bug (or configuration error) in kmemleak

["Luis R. Rodriguez" <lrodriguez@atheros.com>]

On Thu, Jun 17, 2010 at 02:21:56AM -0700, Sankar P wrote:
> Hi,
> 
> I wanted to detect memory leaks in one of my kernel modules. So I
> built Linus' tree  with the following config options enabled (on top
> of make defconfig)
> 
> CONFIG_DEBUG_KMEMLEAK=y
> CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=400
> CONFIG_DEBUG_KMEMLEAK_TEST=y
> 
> If I boot with this kernel, debugfs is automatically mounted. But I do
> not have the file:
> 
> /sys/kernel/debug/kmemleak
> 
> created at all. There are other files like kprobes in the mounted
> /sys/kernel/debug directory btw. So I am not able to detect any of the
> memory leaks. Is there anything I am doing wrong or missing (or) is
> this a bug in kmemleak ?
> 
> Please let me know your suggestions to fix this and get memory leaks
> reporting working. Thanks.
> 
> The full .config file is also attached with this mail. Sorry for the
> attachment, I did not want to paste 5k lines in the mail. Sorry if it
> is wrong.


This is odd.. Do you see this message on your kernel ring buffer?

Failed to create the debugfs kmemleak file

  Luis