On Tue, Apr 24, 2012 at 6:17 AM, Inki Dae <inki.dae at samsung.com> wrote: > this feature could be used to use memory region allocated by malloc() in user > mode and mmaped memory region allocated by other memory allocators. userptr > interface can identify memory type through vm_flags value and would get > pages or page frame numbers to user space appropriately.
Is there anything to stop the unpriviledged userspace driver locking all the RAM in the machine inside userptr? seems like a very bad plan, I know TTM has code to address this sort of things with limits. Dave.
