linux-kernel - Re: LOCKDEP: 3.9-rc1: mount.nfs/4272 still has locks held!

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Message-ID: <20130306134004.16252a21@tlielax.poochiereds.net>
Date:	Wed, 6 Mar 2013 13:40:04 -0500
From:	Jeff Layton <jlayton@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Tejun Heo <tj@...nel.org>,
	"Myklebust, Trond" <Trond.Myklebust@...app.com>,
	Mandeep Singh Baines <msb@...omium.org>,
	Ming Lei <ming.lei@...onical.com>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Al Viro <viro@...IV.linux.org.uk>
Subject: Re: LOCKDEP: 3.9-rc1: mount.nfs/4272 still has locks held!

On Wed, 6 Mar 2013 19:17:35 +0100
Oleg Nesterov <oleg@...hat.com> wrote:

> On 03/05, Jeff Layton wrote:
> >
> > Anyone up for working out how to handle a freeze event on a process
> > that already has a pending signal, while it's being ptraced?
> 
> Could you explain the problem?
> 

Not very well. I was just saying that the signal/ptrace stuff is very
complicated already. Now we're looking at mixing in the freezer too,
which further increases the complexity.

Though when I said that, it was before Tejun mentioned hooking this up
to ptrace. I'll confess that I don't fully understand what he's
proposing either though...

-- 
Jeff Layton <jlayton@...hat.com>
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