linux-kernel - Re: 2.6.24-rc4-mm1

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Message-Id: <20071206040420.6c89c675.akpm@linux-foundation.org>
Date:	Thu, 6 Dec 2007 04:04:20 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Valdis.Kletnieks@...edu
Cc:	linux-kernel@...r.kernel.org, dm-devel@...hat.com
Subject: Re: 2.6.24-rc4-mm1

On Thu, 06 Dec 2007 06:49:24 -0500 Valdis.Kletnieks@...edu wrote:

> On Tue, 04 Dec 2007 21:17:01 PST, Andrew Morton said:
> >   ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc4/2.6.24-rc4-mm1/
> 
> Something in here broke LVM support - an initrd that has worked fine for
> quite some time suddenly couldn't mount /dev/VolGroup00/root so we get the
> infamous "Kernel panic - not syncing: Attempted to kill init!" when we
> fall off the end of the initrd and haven't pivoted to the real disk.
> 
> It finds the disk OK:
> 
> [   81.202310] sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB)
> [   81.214466] sd 0:0:0:0: [sda] Write Protect is off
> [   81.226467] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> [   81.238436] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> [   81.250780]  sda: sda1 sda2
> [   75.396119] sd 0:0:0:0: [sda] Attached SCSI disk
> 
> but then the lvm command says it can't find the volume group VolGroup00 (which
> is actually sda2 - sda1 is a small /boot partition, rest of disk is LVM).
> 
> A quick look at the rc4-mm1 announcement doesn't have any obviously tempting
> patch names to start at, so it looks like it's time to play mm-bisect.  It may
> take me a day or two, as I have some time management issues this week...
> 

OK, thanks.

First step would be to eliminate rewrite-rd.patch: maybe the ramdisk driver
in which that initrd resides is bust.

After that, agk-dm-dm-*.patch are of course the ones to look at.

Please keep dm-devel@...hat.com cc'ed.
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