Arjan van de Ven <arjanv@redhat.com> writes: > On Fri, 2004-03-05 at 19:25, Ed L Cashin wrote: >> Hi. I read somewhere that seemed authoritative (unfortunately I >> forget where) that you could use the rmap stuff to get both the >> mm_struct pointer and the task_struct pointer associated with a PTE >> given that PTE. >> >> I see in mm/rmap.c:try_to_unmap_one that you can use ptep_to_mm to get >> the mm. I think it's pretty neat: the mm pointer is hidden in the >> mapping field of the page struct describing the page where the pte >> lives. > > there is a fundamental issue wrt task_struct: there can be *many* of > those for any given PTE, since tasks can (and do in the case of threads) > share the mm. I should have mentioned that I know that multiple threads can share an mm. The question is more general: how to get the owner(s) of the mm. -- --Ed L Cashin | PGP public key: ecashin@uga.edu | http://noserose.net/e/pgp/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
