From: Avi Kivity <avi@argo.co.il>
To: ebiederm@xmission.com
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, akpm@osdl.org, pj@sgi.com,
saito.tadashi@soft.fujitsu.com, ak@suse.de
Subject: Re: [RFC][PATCH] ps command race fix take2 [1/4] list token
Date: Wed, 23 Aug 2006 12:55:12 +0300 [thread overview]
Message-ID: <44EC2600.3070006@argo.co.il> (raw)
In-Reply-To: <m1ac5woube.fsf@ebiederm.dsl.xmission.com>
ebiederm@xmission.com wrote:
>
> I almost removed the tasklist_lock from all read paths. But as it
> happens sending a signal to a process group is an atomic operation
> with respect to fork so that path has to take the lock, or else
> we get places where "kill -9 -pgrp" fails to kill every process in
> the process group. Which is even worse.
>
Can't that be fixed by adding a per-pgrp lock, and having both
fork()/clone() and kill(-pgrp) take that lock?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2006-08-23 9:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-22 8:39 [RFC][PATCH] ps command race fix take2 [1/4] list token KAMEZAWA Hiroyuki
2006-08-22 11:06 ` Andi Kleen
2006-08-22 11:23 ` KAMEZAWA Hiroyuki
2006-08-22 16:56 ` Eric W. Biederman
2006-08-22 22:22 ` KAMEZAWA Hiroyuki
2006-08-23 6:11 ` Eric W. Biederman
2006-08-23 8:33 ` KAMEZAWA Hiroyuki
2006-08-23 11:35 ` Eric W. Biederman
2006-08-23 12:46 ` KAMEZAWA Hiroyuki
2006-08-23 9:55 ` Avi Kivity [this message]
2006-08-23 12:12 ` Eric W. Biederman
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