On Mon, Jul 26, 2010 at 08:08:34PM +0200, Oleg Nesterov wrote:

On 07/26, Sridhar Samudrala wrote:

quoted

I have been testing out a similar patch that uses kernel_thread() without CLONE_FILES
flag rather than create_kthread() and then closing the files.

!CLONE_FILES can't help. copy_files() does dup_fd() in this case.
The child still inherits the files.

quoted

Either version should be fine.

I think neither version is fine ;)

exit_files() is not enough too. How about the signals,

As I said, signals are unimportant as we are using this
thread to base a worker on - it sleeps uninterruptibly.

reparenting?

That's actually a feature: it lets us find out which process
owns the device using the thread by looking at the parent.

I already forgot all details, probably I missed somethig. But it
seems to me that it is better to just export get/set affinity and
forget about all complications.

Oleg.