On Thu, 2009-03-19 at 11:47 -0400, Rik van Riel wrote:
> Larry Woodman wrote:
> > I've implemented several mm tracepoints to track page allocation and
> > freeing, various types of pagefaults and unmaps, and critical page
> > reclamation routines.  This is useful for debugging memory allocation
> > issues and system performance problems under heavy memory loads.
> > Thoughts?:
> 
> It looks mostly good.
> 
> I believe that the vmscan.c tracepoints could be a little
> more verbose though, it would be useful to know whether we
> are scanning anon or file pages and whether or not we're
> doing lumpy reclaim.  Possibly the priority level, too.
> 

The attached patch addresses your concerns.  Can you have a look: