Re: RFC: named anonymous vmas

[Christoph Hellwig]

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 from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/