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From: Keith Owens <kaos@ocs.com.au>
To: Kurt Garloff <garloff@suse.de>
cc: Linux kernel list <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.0-test: rmmod -a without effect
In-Reply-To: Your message of "Wed, 29 Nov 2000 01:37:22 BST."
             <20001129013721.C1777@garloff.etpnet.phys.tue.nl>
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Date: Wed, 29 Nov 2000 15:20:07 +1100
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On Wed, 29 Nov 2000 01:37:22 +0100,
Kurt Garloff <garloff@suse.de> wrote:
>this is a 2.4.0-test11 system;
>rmmod -a (modutils-2.3.21) fails to unload unused autocleanable modules:

Designed behaviour.  sys_delete_module only removes autoclean modules
that have been used at least once, either they have been used or some
other module has a reference to them.  Otherwise you get nasty races
like this

  cpu 0                           cpu 1
  request_module(foo)
    modprobe -k foo
      insmod -k foo
        foo is loaded, unused
  kernel sees foo has loaded
                                  rmmod -a
  kernel uses foo

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