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

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Date:	Tue, 10 Apr 2007 17:53:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Oleg Nesterov <oleg@...sign.ru>, Robin Holt <holt@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Chris Snook <csnook@...hat.com>, linux-kernel@...r.kernel.org,
	Jack Steiner <steiner@...ricas.sgi.com>
Subject: Re: init's children list is long and slows reaping children.


* Eric W. Biederman <ebiederm@...ssion.com> wrote:

> > so ... is anyone pursuing this? This would allow us to make 
> > sys_wait4() faster and more scalable: no tasklist_lock bouncing for 
> > example.
> 
> which part?

all of it :) Everything you mentioned makes sense quite a bit. The 
thread signal handling of do_wait was added in a pretty arbitrary 
fashion so i doubt there are strong requirements in that area. Apps 
might have grown to get used to it meanwhile though, so we've got to do 
it carefully.

	Ingo
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