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From: "Artem B. Bityutskiy" <dedekind@yandex.ru>
To: linux-kernel@vger.kernel.org
Subject: Re: [QUESTION/sysfs] strange refcounting
Date: Sat, 04 Feb 2006 15:04:45 +0300	[thread overview]
Message-ID: <43E4985D.3070708@yandex.ru> (raw)
In-Reply-To: <1139040821.13125.4.camel@sauron.oktetlabs.ru>

Artem B. Bityutskiy wrote:
> Then, I see /sys/devices/mydev/ in sysfs. I open
> pre-defined /sys/devices/mydev/power/state in userspace and don't close it. 
> 
> Then I run lsmod, and see zero refcount to my module. Well, I run rmmod
> mymod, module is unloaded. 
> 
> Then I close /sys/devices/mydev/power/state, and enjoy segfault. 
> 
I actually forgot to formulate my question: why module's refcount is not 
increased when somebody opens a sysfs file which belongs to this module? 
How to withstan to an unexpected module unload?

Thanks.

-- 
Best Regards,
Artem B. Bityutskiy,
St.-Petersburg, Russia.

  reply	other threads:[~2006-02-04 12:04 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-04  8:13 [QUESTION/sysfs] strange refcounting Artem B. Bityutskiy
2006-02-04 12:04 ` Artem B. Bityutskiy [this message]
2006-02-04 13:33   ` Artem B. Bityutskiy
2006-02-06  9:58     ` Artem B. Bityutskiy
2006-02-06 17:20       ` Artem B. Bityutskiy
  -- strict thread matches above, loose matches on Subject: below --
2006-02-03 14:16 Artem B. Bityutskiy
2006-02-03 17:08 ` Greg KH

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