linux-kernel - Re: [bug] latest -git boot hang

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Message-ID: <s5h1vykkhts.wl%tiwai@suse.de>
Date:	Mon, 13 Oct 2008 10:41:35 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Tejun Heo <tj@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>
Subject: Re: [bug] latest -git boot hang

At Sat, 11 Oct 2008 09:50:19 +0900,
Tejun Heo wrote:
> 
> Hello,
> 
> Linus Torvalds wrote:
> > On Fri, 10 Oct 2008, Ingo Molnar wrote:
> >> | 870d6656126add8e383645732b03df2b7ccd4f94 is first bad commit
> >> | commit 870d6656126add8e383645732b03df2b7ccd4f94
> >> | Author: Tejun Heo <tj@...nel.org>
> >> | Date:   Mon Aug 25 19:47:25 2008 +0900
> >> |
> >> |     block: implement CONFIG_DEBUG_BLOCK_EXT_DEVT
> >>
> >> and meanwhile 2 other test-systems failed to boot as well - both have 
> >> CONFIG_DEBUG_BLOCK_EXT_DEVT=y.
> >>
> >> So i guess this debug feature is working as expected.
> > 
> > Ahh, yeah, sounds that way.
> > 
> >> I guess we should mark CONFIG_DEBUG_BLOCK_EXT_DEVT=y as really dangerous 
> >> to enable because contemporary distributions (i tried Fedora 9) fail 
> >> with it too?
> > 
> > Tejun - do you know whether _any_ distro will boot with 
> > CONFIG_DEBUG_BLOCK_EXT_DEVT=y?
> 
> Hmmm... openSUSE 11.0 didn't have any problem with it, which I was a bit
> pleasantly surprised about.  I haven't tested management tools but the
> base system worked just fine.

FYI, even on openSUSE 11.0, it gets a problem when you run mkinitrd on
the kernel with CONFIG_DEBUG_BLOCK_EXT_DEVT=y.  It's a problem of SUSE
mkinitrd, though.


Takashi
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