To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: kernel threads holding /dev/console
References: <yw1x8yi3dpz8.fsf@ford.guide>
	<20040314150346.387b59a6.akpm@osdl.org>
From: mru@kth.se (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=)
Date: Mon, 15 Mar 2004 00:15:41 +0100
In-Reply-To: <20040314150346.387b59a6.akpm@osdl.org> (Andrew Morton's
 message: 03:46 -0800")
Message-ID: <yw1x4qsrdnqa.fsf@ford.guide>
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Andrew Morton <akpm@osdl.org> writes:

> mru@kth.se (M?ns Rullg?rd) wrote:
>>
>> I'm trying to set up a pivot_root hack to do some things, switch root,
>>  and then unmount the original root.  However, the unmount fails
>>  because ksoftirqd/0, events/0, kblockd/0 and aio/0 have /dev/console
>>  opened.  Why are they doing this?  Can it be prevented?  This happens
>>  when using kernel 2.6.3 (2.6.4 is reportedly broken on Alpha).  It
>>  works with a 2.4 kernel using the same script.  Does anyone have a
>>  hint?
>
> That's a bug.
>
> keventd and friends are currently holding /dev/console open three times. 
> It's all inherited from init.
>
> Steal the relevant parts of daemonize() to fix that up.

That did the trick.  Thanks for the quick response.

-- 
M?ns Rullg?rd
mru@kth.se
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