From: Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
To: linux-hotplug@vger.kernel.org
Subject: unloading drivers and usage counters
Date: Sun, 21 Jan 2001 21:12:14 +0000 [thread overview]
Message-ID: <marc-linux-hotplug-98011145918383@msgid-missing> (raw)
Hi,
going through the hotplugging scripts I noticed that there's no good way to
unload modules. A time based approach cannot be used due to race conditions.
Unloading on device removal requires keeping a usage counter in user space.
This seems to be a brittle approach.
Not increasing the module usage counters on connect seems to be the wrong
strategy. The desire to keep the modules unloadable has come back to bite us
into our behind.
If the usage counters were increased for each connected device unloading would
come natural. A patch to disconnect drivers by an ioctl has been posted. It
would allow forced unload.
Regards
Oliver
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next reply other threads:[~2001-01-21 21:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-21 21:12 Oliver Neukum [this message]
2001-01-22 5:28 ` unloading drivers and usage counters David Brownell
2001-01-22 6:04 ` David Hinds
2001-01-22 16:26 ` David Brownell
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