Tracing changes to mm->nr_ptes

[Paddie O'Brien]

Hi,

As a learning exercise I'm using systemtap to trace all calls to
pte_alloc() in the context of a particular process. pte_alloc()
allocates a page table and increments mm->nr_ptes. However, the first
time pte_alloc() is called (and the first time I can intercept it)
mm->nr_ptes is already equal to 1. I cannot find the initial increment
of mm->nr_ptes. Anyone know where I should look?!

Thanks.