Re: [PATCH 0/1] kthreads: simplify !kthreadd_task logic, kill kthreadd_task_init_done

[Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>]

On Sat, 19 Sep 2009, Oleg Nesterov wrote:
>
> On 09/18, Linus Torvalds wrote:
> >
> > As to why pid == 0 wouldn't work, I don't know, but I'll take your word
> > for it.
> 
> Say, admin wants to renice kthreadd or change its affinity. And we can't
> show kthread in /proc if its pid is 0.

Ok, so it's a "that's not good" kind of situation, rather than a "it 
wouldn't work" one. Fair enough.

Of course, another way to do this would be to simply use CLONE_STOPPED to 
create the 'init' task first, but not wake it up - and then wake it up 
only after kthreadd exists.

I'm sure there are other things we could do ;)

		Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html