linux-kernel - Re: Shutdown and Reboot Regression 2.6.25-rc[78]

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Date:	Fri, 11 Apr 2008 23:42:48 +0200
From:	Bongani Hlope <bonganilinux@...b.co.za>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Shutdown and Reboot Regression 2.6.25-rc[78]

On Friday 11 April 2008 22:58:12 Linus Torvalds wrote:
> On Fri, 11 Apr 2008, Bongani Hlope wrote:
> > I found a regression in version 2.6.25-rc7, which causes my computer not
> > to shutdown or reboot. I get a complete lock up (no keyboard and Sys-Rq)
> > just before it normally shuts down the alsa service.
> >
> > I did a git bisect and it points to this reversion:
> > [266c2e0abeca649fa6667a1a427ad1da507c6375] Make printk() console
> > semaphore accesses sensible
>
> Interesting. That commit _should_ have just moved code around with no
> actual semantic changes.
>
> Can you verify that undoing just that one commit makes current git (-rc9)
> work for you? Ie just try a
>
> 	git revert 266c2e0abeca649fa6667a1a427ad1da507c6375
>
> on top of the current tree. I just want to check, because even after
> looking at that diff again, I'm not seeing what it could actually change.
>

After about 4 restarts and 4 reboots, 2.6.25-rc9 seems to work fine with and 
without the revert. I'll do some more testing.  The assembly output files for 
kernel/printk.c don't seem that different between rc9 and rc7. I'll see what 
else I can test.

Thanx
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