From: Jon Leighton <leighton@cis.udel.edu>
To: linux-sctp@vger.kernel.org
Subject: Re: How to unload lksctp kernel module?
Date: Tue, 26 Feb 2013 15:00:38 +0000 [thread overview]
Message-ID: <512CCE16.7050109@cis.udel.edu> (raw)
In-Reply-To: <512BDEFF.4090103@redhat.com>
On 2/26/13 9:13 AM, Vlad Yasevich wrote:
> On 02/25/2013 05:00 PM, Daniel Borkmann wrote:
>> (cc: linux-sctp, which is the right list to address this question)
>>
>> On 02/25/2013 03:39 PM, Jon Leighton wrote:
>>> I'm trying to unload the lksctp kernel module (sudo modprobe -r sctp),
>>> but the operation fails with "FATAL: Module sctp is in use.". lsmod
>>> shows a reference count of 2 for sctp. If I restart the machine, and
>>> load the lksctp module by running a simple SCTP based program, the
>>> module loads, but the reference count is 2 again, and the module can't
>>> be unloaded. I've also tried to force the unload with sudo rmmod -f
>>> sctp, but that fails with "ERROR: Removing 'sctp': Resource temporarily
>>> unavailable". Is there a way to unload the module? I'm running Ubuntu
>>> 10.04 LTS with linux kernel 2.6.32-45-generic-pae. Thanks for any help.
>
> rmmod -f used to work, but I haven't tried it lately.
>
> The reason for the ref=2 is that when lksctp starts up, it creates a
> control socket which holds those 2 refs on the module. 'modprobe -r'
> will not let you unload when the module is refed. rmmod -f works
> around that.
sudo rmmod -f sctp returns "ERROR: Removing 'sctp': Resource temporarily
unavailable". Is there any workaround for this? Or perhaps this means
that I need to rebuild my kernel with CONFIG_MODULE_FORCE_UNLOAD enabled?
> -vlad
>
>>>
>>> - Jon
>> --
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>
next prev parent reply other threads:[~2013-02-26 15:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-25 22:00 How to unload lksctp kernel module? Daniel Borkmann
2013-02-26 14:13 ` Vlad Yasevich
2013-02-26 15:00 ` Jon Leighton [this message]
2013-02-26 15:21 ` Vlad Yasevich
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