linux-kernel - Re: init's children list is long and slows reaping children.

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Date:	Fri, 6 Apr 2007 22:21:18 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Oleg Nesterov <oleg@...sign.ru>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Robin Holt <holt@....com>, Chris Snook <csnook@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: init's children list is long and slows reaping children.


* Oleg Nesterov <oleg@...sign.ru> wrote:

> Probably it is I who missed something :)
> 
> But why can't we do both changes? I think it is just ugly to use init 
> to reap the kernel thread. Ok, wait4() can find zombie quickly if we 
> do the ->children split. But /sbin/init could be swapped out, we still 
> need to deliver SIGCHLD, etc.
> 
> And I personally agree with Linus, it is nice to hide the kernel 
> threads from /sbin/init (or whatever) completely.

yeah, they should all be made auto-reap - nobody is really interested in 
their wait4()-driven completion. (any completion they do is via other 
mechanisms)

	Ingo
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