On Mon, Jun 24, 2013 at 4:48 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > 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. If each app gets its own writable directory that's not really different than a world writable tmpfs. It requires something that watches for apps to exit for any reason and cleans up their directories, and it requires each app to come up with an unused name when it wants to create a file, and the kernel can give you both very cleanly. -- 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>