netdev - Re: 2.6.29 on MacBook 2,1 fails to reboot (was Re: 2.6.29-git13: Reported regressions from 2.6.28)

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Message-ID: <49DBA821.1070408@s5r6.in-berlin.de>
Date:	Tue, 07 Apr 2009 21:23:13 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	"Trenton D. Adams" <trenton.d.adams@...il.com>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	Linux ACPI <linux-acpi@...r.kernel.org>,
	Linux PM List <linux-pm@...ts.linux-foundation.org>,
	Linux SCSI List <linux-scsi@...r.kernel.org>,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: 2.6.29 on MacBook 2,1 fails to reboot (was Re: 2.6.29-git13:
 	Reported regressions from 2.6.28)

Trenton D. Adams wrote:
> On Tue, Apr 7, 2009 at 11:10 AM, Stefan Richter
> <stefanr@...6.in-berlin.de> wrote:
>>>> http://bugs.gentoo.org/show_bug.cgi?id=253535
>> Interdependencies between ALSA modules have changed.  The Gentoo init
>> scripts attempted to unload them in an order which deadlocked modprobe
>> due to dependencies.  The fix for Gentoo is to just not unload the
>> modules on system shutdown.  My Gentoo/amd64 Mac mini was affected by
>> this too; fixed by userland update.
>>
> 
> While that is interesting, I am not seeing that problem on my Gentoo
> box (the macbook), which is completely up-to-date.  2.6.28 works, and
> 2.6.29 doesn't.  Same init scripts, different kernels.

Note that the respective update changed /etc/conf.d/alsasound (a local
configuration file) to include
UNLOAD_ON_STOP="no"
KILLPROC_ON_STOP="no"
This change by update is not activated by a mere emerge; one needs to
incorporate that change with dispatch-conf or an equivalent method.
(Or simply edit the file to have these variables set to "no".)

> And sure, I could put a comment on the rmmod, in the init script, but
> IMO that would be a hack around a _bug_.  Which is fine for me.  But,
> is it worth leaving the issue in the kernel?

Is it a kernel issue if a script attempts to unload a busy module, then
fails to proceed?  I wouldn't think so.

But more importantly, is this init scripts related bug really what's
happening at your system?  Or do you actually experience an entirely
different bug?
-- 
Stefan Richter
-=====-=-=== -=-= -==-=
http://arcgraph.de/sr/
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