Message-ID: <4852E8D5.3000503@nortel.com>
Date: Fri, 13 Jun 2008 15:38:29 -0600
From: "Chris Friesen" <cfriesen@nortel.com>
User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513)
MIME-Version: 1.0
To: linux-kernel@vger.kernel.org, vatsa@linux.vnet.ibm.com,
       a.p.zijlstra@chello.nl
Subject: odd timing bug with cgroups?
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 917
Lines: 21


I'm seeing some odd behaviour in the case where a parent task forks a 
child and then immediately attempts to put the child into a group.

It appears that there is a window after task creation where the child 
task is in "limbo" such that the parent cannot put it into a group.  If 
I run the parent under "strace" or else sleep for a bit before trying to 
put the child into a group, then everything works fine.

This seems odd...I would think that as soon as the fork() call returns 
in the parent we should be able to put that task into a group.

I'm just starting to look at the code, but I thought I'd mention it in 
case someone knows exactly where to look.

Chris
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/