linux-kernel - Re: [PATCH 2/2] Fix (improve) deadlock condition on module removal netfilter socket option removal

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Message-Id: <1189040290.12261.172.camel@jcmlaptop>
Date:	Wed, 05 Sep 2007 20:58:10 -0400
From:	Jon Masters <jonathan@...masters.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Neil Horman <nhorman@...driver.com>, adam@...drasil.com,
	jcm@...masters.org, kaber@...sh.net,
	netfilter-devel@...ts.netfilter.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Fix (improve) deadlock condition on module removal
	netfilter socket option removal

On Thu, 2007-09-06 at 08:41 +1000, Rusty Russell wrote:
> On Wed, 2007-09-05 at 16:26 -0400, Jon Masters wrote:
> > On Tue, 2007-09-04 at 16:30 -0400, Neil Horman wrote:
> > 
> > > 	2nd of two patches.  This patch enhances modprobe to operate like rmmod
> > > in non-blocking mode.  It also adds a -w option to allow for explicit blocking
> > > operation.
> > 
> > As I suspected, this patch isn't in the tree. I am going to commit it
> > now because it makes sense. I'm also going to sort out moving things to
> > kernel.org this afternoon while I'm at it - I don't want to confuse
> > people with kerneltools.org any more now I've got a kernel.org acc.
> 
> 1) You don't want to hand the "wait" flag (ie ~O_NONBLOCK) to
> sub-rmmods,
> 
> 2) You need to do something about this code if wait is specified:
> 
> 	if (usecount != 0) {
> 		if (!ignore_inuse)
> 			error("Module %s is in use.\n", name);
> 		goto remove_rest;
> 	}

Goodness, I suck. I'll get it fixed properly.

Jon.


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