Re: [patch 0/2] object debugging infrastructure

Thomas Gleixner
2008-03-02T09:55:34Z

On Sat, 1 Mar 2008, Greg KH wrote:
> On Sat, Mar 01, 2008 at 10:24:52AM -0000, Thomas Gleixner wrote:
> > We can see an ever repeating problem pattern with objects of any kind in
> > the kernel:
> >
> > 1) free of active objects
> > 2) reinitialization of active objects
>
> Ah, this looks nice. For kobjects I would like to track the above, as
> well as:
> - use of initialized objects
> - use of "freed" objects
> - objects that are never destroyed, yet the code controlling
> them thinks they are.
>
> I say "freed" as sometimes kobjects are in static structures and are not
> in memory that ends up being kfree() so slab poisoning doesn't help.

Good point. I try to come up with the infrastructure for that.

> Do you think that would be able to worked into this framework? At first
> glance, it seems like it would be easy to add, but would like to make
> sure.

Yes, that should be possible

> If so, I'll gladly add this to the kobjects to help with issues there.

kobjects came to my mind as well, when I was thinking about possible
use cases.

Thanks,

tglx