On Wed, 24 Apr 2013, Jan Kara wrote: > Hello, > > when checking users of get_user_pages() (I'm doing some cleanups in that > area to fix filesystem's issues with mmap_sem locking) I've noticed that > infiniband drivers add number of pages obtained from get_user_pages() to > mm->pinned_vm counter. Although this makes some sence, it doesn't match > with any other user of get_user_pages() (e.g. direct IO) so has infiniband > some special reason why it does so? get_user_pages typically is used to temporarily increase the refcount. The Infiniband layer needs to permanently pin the pages for memory registration. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>