2.4.23/others and ip_conntrack causing hangs

From: James Bourne (jbourne_at_hardrock.org)
Date: 11/30/03

  • Next message: William Lee Irwin III: "Re: Oops with tmpfs on both 2.4.22 & 2.6.0-test11" 
    Date:	Sun, 30 Nov 2003 12:21:33 -0700 (MST)
To: linux-kernel@vger.kernel.org, <coreteam@netfilter.org>

    Hi all,
    I wanted to bring up an issue with ip_conntrack in 2.4.23, 2.4.22, and at
    least 2.4.21 (sorry, didn't try 2.4.20).

    The issue is that as long as there are connections being tracked, the
    ip_conntrack module will not unload. I can understand why this might be,
    but the problem is that ip_conntrack will hang rmmod and modprobe -r until
    such time as all the connections have been closed.

    I think we need something like an ip_conntrack_flush or else completely drop
    the connections when the module is unloaded (as previously done) as this
    becomes an issue for people who need to drop their ip_tables and reload the
    modules (perhaps to correct other issues) especially ip_conntrack...

    The only way to reload the modules right now (yes, I know removing modules
    from a running kernel is dodgey anyway) is to completely drop the network
    interfaces which kills off the connections *anyway*. So, dropping the
    connections shouldn't be an issue.

    Thanks for the consideration.

    Regards
    James 

    -- 
James Bourne                  | Email:            jbourne@hardrock.org          
Unix Systems Administrator    | WWW:           http://www.hardrock.org
Custom Unix Programming       | Linux:  The choice of a GNU generation
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