On Wed, Jun 25, 2014 at 2:45 PM, Dave Hansen <dave.han...@intel.com> wrote: > On 06/25/2014 02:05 PM, Andy Lutomirski wrote: >> Hmm. the memfd_create thing may be able to do this for you. If you >> created a per-mm memfd and mapped it, it all just might work. > > memfd_create() seems to bring a fair amount of baggage along (the fd > part :) if all we want is a marker. Really, all we need is _a_ bit, and > some way to plumb to userspace the RSS values of VMAs with that bit set. > > Creating and mmap()'ing a fd seems a rather roundabout way to get there.
Hmm. So does VM_MPX, though. If this stuff were done entirely in userspace, then memfd_create would be exactly the right solution, I think. Would it work to just scan the bound directory to figure out how many bound tables exist? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
