Re: [PATCH v2 sl-b 1/5] mm: Add mem_dump_obj() to print source of memory block

Paul E. McKenney
2020-12-09T17:59:20Z

On Wed, Dec 09, 2020 at 05:53:06PM +0000, Christoph Hellwig wrote:
> On Wed, Dec 09, 2020 at 06:57:02AM -0800, Paul E. McKenney wrote:
> > On Wed, Dec 09, 2020 at 08:17:10AM +0000, Christoph Hellwig wrote:
> > > Your two new exports don't actually seem to get used in modular code
> > > at all in this series.
> >
> > Indeed, and I either need to remove the exports or make my test code in
> > kernel/rcu/rcuscale.o suitable for upstreaming. Or find the appropriate
> > mm/slab selftest location.
>
> I'd rather not export something like this which pokes deep into
> internals. That being said I've been working on off on a
> EXPORT_SYMBOL_FOR() that just exports a symbol to one specific module.
> Hopefully I'll finish it for the next merge window, and with that
> I'd feel much more comfortable with an export.

That would be really useful! I have a number of symbols that should
only be used by a few specific in-tree modules, independent of this
patch series.

For my part, I will see if there is a good mm-related location for this
sort of selftest.

Thanx, Paul