linux-kernel - Re: [ckrm-tech] [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem

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Message-ID: <20070405144609.GJ28414@in.ibm.com>
Date:	Thu, 5 Apr 2007 20:16:09 +0530
From:	Srivatsa Vaddagiri <vatsa@...ibm.com>
To:	"Paul Menage" <menage@...gle.com>
Cc:	sekharan@...ibm.com, ckrm-tech@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, xemul@...ru, rohitseth@...gle.com,
	pj@....com, "Eric W. Biederman" <ebiederm@...ssion.com>,
	mbligh@...gle.com, winget@...gle.com, containers@...ts.osdl.org,
	"Serge E. Hallyn" <serue@...ibm.com>, dev@...ru, devel@...nvz.org
Subject: Re: [ckrm-tech] [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem

On Thu, Apr 05, 2007 at 07:13:37AM -0700, Paul Menage wrote:
> > ns should have a refcount of 1 to begin with.
> 
> Right - that's my point, you're effectively passing the initial
> refcount of the nsproxy to the container directory's d_fsdata
> reference.

sure ..

> > Basically I am struggling to answer "How can a zero refcount (beancounter)
> > object go non-zero when zero tasks are attached to it" ..
> 
> In that case, I think you're fine. Your last posted patches didn't
> provide a way to check for that, though, as far as I could see.

Yes, the last patch I posted is very primitive considering all the
discussions we had ..For ex: attach_task() in the last patch has more
bugs [apart from the exit race I found recently with cpusets/containers]
Each time I stopped and stared at attach_task() I could find a bug ..

-- 
Regards,
vatsa
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