On Thu, May 05, 2016 at 09:45:07PM +0000, Verma, Vishal L wrote: > I'm not sure I completely understand how this will work? Can you explain > a bit? Would we have to export rw_bytes up to layers above the pmem > driver? Where does get_user_pages come in? A DAX filesystem can directly use the nvdimm layer the same way btt doe,s what's the problem? Re get_user_pages my idea was to simply use that to lock down the user pages so that we can call rw_bytes on it. How else would you do it? Do a kmalloc, copy_from_user and then another memcpy? -- 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>