On Sat, Jun 22, 2013 at 12:47:29PM -0700, Alex Elsayed wrote: > Couldn't this be done by having a root-only tmpfs, and having a userspace > component that creates per-app directories with restrictive permissions on > startup/app install? Then each app creates files in its own directory, and > can pass the fds around. Honestly having a device that allows passing fds around that can be mmaped sounds a lot simpler. I have to admit that I expect /dev/zero to do this, but looking at the code it creates new file structures at ->mmap time which would defeat this. -- 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>