Re: why network devices don't do reference counting? (Re: [PATCH]Module use count must be updated as bridges are created/destroyed)
From: Stephen Hemminger
Date: Wed Sep 26 2007 - 17:06:54 EST
On Wed, 26 Sep 2007 23:06:53 +0200
Oleg Verych <olecom@xxxxxxxxxxxxxx> wrote:
> * Wed, 26 Sep 2007 08:37:05 -0700
> * Organization: Linux Foundation
> > On Wed, 26 Sep 2007 08:53:27 +0100
> > "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
> >> Otherwise 'modprobe -r' on a module having a dependency on bridge will
> >> implicitly unload bridge, bringing down all connectivity that was
> >> using bridges.
> >> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
> > No, network devices don't do reference counting.
> Could you explain why, please?
> After `udevd` on boot loads lots of unused crap, i surrendered, and use
> $(rmmod `lsmod | just first column`). Networing bravely wipes away. OK,
> there are lots of configs: udev, hotplug, modprobe, that somebody might
> like to fix. But it came to the end with me. I just don't care. So,
> please answer :)
For hotplug and other reasons, the network developers decided that being
able to remove a network module at any time was a good thing. It works.
Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx>
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