Message-ID: <AANLkTinbn5yjuekiVcHMkX7JLixohPTGuiFg+_wbDpUO@mail.gmail.com>
Date:	Tue, 27 Jul 2010 09:03:36 -0700
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	Stefan Bader <stefan.bader@...onical.com>
Cc:	Daniel J Blueman <daniel.blueman@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Ubuntu Kernel Team <kernel-team@...ts.ubuntu.com>,
	linux-ext4@...r.kernel.org,
	linux-wireless <linux-wireless@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: udevd / ext4 issue mounting 2.6.35-rc5

On Tue, Jul 27, 2010 at 5:34 AM, Stefan Bader
<stefan.bader@...onical.com> wrote:
> On 07/27/2010 01:43 AM, Luis R. Rodriguez wrote:
>> On Fri, Jul 23, 2010 at 10:56 AM, Luis R. Rodriguez <mcgrof@...il.com> wrote:
>>> On Fri, Jul 23, 2010 at 9:49 AM, Luis R. Rodriguez <mcgrof@...il.com> wrote:
>>>> On Thu, Jul 22, 2010 at 2:10 AM, Daniel J Blueman
>>>> <daniel.blueman@...il.com> wrote:
>>>>> On 22 July 2010 02:06, Luis R. Rodriguez <mcgrof@...il.com> wrote:
>>>>>> On Wed, Jul 21, 2010 at 1:43 AM, Daniel J Blueman
>>>>>> <daniel.blueman@...il.com> wrote:
>>>>>>> Hi Luis,
>>>>>>>
>>>>>>> On 21 July 2010 01:36, Luis R. Rodriguez <mcgrof@...il.com> wrote:
>>>>>>>> I have been reluctant to boot to 2.6.35-rc due to the large set of
>>>>>>>> regression list and the amount of work I needed to actually get done
>>>>>>>> on 2.6.35. Last I checked the regression list it was getting small so
>>>>>>>> I gave it a spin today. No luck. I get some bootup error from udevd
>>>>>>>> and ext2/ext3/ext4, something like this:
>>>>>>>>
>>>>>>>> EXT3-fs (sda1): error: couldn't mount because of unsupported optional
>>>>>>>> features (240)
>>>>>>>> EXT2-fs (sda1): error: couldn't mount because of unsupported optional
>>>>>>>> features (240)
>>>>>>>> EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
>>>>>>>
>>>>>>> This succeeded.
>>>>>>
>>>>>> Heh, OK :)
>>>>>>
>>>>>>>> VFS: Mounted root (ext4 filesystem) readonly on device 8:1
>>>>>>>> Freeing unused kernel memory: 708k freed
>>>>>>>> Write protecting the kernel read-only data: 102040k
>>>>>>>> Freeing unused kernel memory: 764k freed
>>>>>>>> Freeing unused kernel memory: 1796k freed
>>>>>>>> udevd: failed to create queue file: No such file or directory
>>>>>>>> udevd: error creating queue file
>>>>>>>
>>>>>>> It looks like you need to enable:
>>>>>>>
>>>>>>> CONFIG_DEVTMPFS
>>>>>>> CONFIG_DEVTMPFS_MOUNT
>>>>>>
>>>>>> Thanks, it also turned out that when I upgraded from Ubuntu 9.10 to
>>>>>> Ubuntu 10.04 it replaced my own /sbin/installkernel so this was likely
>>>>>> another issue. My /sbin/installkernel changes allow for easy initramfs
>>>>>> installation on Debian/Ubuntu but my patches have been ignored my the
>>>>>> maintainer.
>>>>>>
>>>>>> --- installkernel-ubuntu-10.04  2010-07-21 18:03:34.607678010 -0700
>>>>>> +++ installkernel       2010-01-29 13:17:10.000000000 -0800
>>>>>> @@ -36,7 +36,8 @@
>>>>>>  # Create backups of older versions before installing
>>>>>>  updatever () {
>>>>>>   if [ -f "$dir/$1-$ver" ] ; then
>>>>>> -    mv "$dir/$1-$ver" "$dir/$1-$ver.old"
>>>>>> +    #mv "$dir/$1-$ver" "$dir/$1-$ver.old"
>>>>>> +    rm -f "$dir/$1-$ver" "$dir/$1-$ver.old"
>>>>>>   fi
>>>>>>
>>>>>>   cat "$2" > "$dir/$1-$ver"
>>>>>> @@ -75,5 +76,16 @@
>>>>>>  if [ -f "$config" ] ; then
>>>>>>   updatever config "$config"
>>>>>>  fi
>>>>>> +
>>>>>> +LSB_RED_ID=$(/usr/bin/lsb_release -i -s)
>>>>>> +
>>>>>> +case $LSB_RED_ID in
>>>>>> +"Ubuntu")
>>>>>> +       update-initramfs -c -k  $ver
>>>>>> +       update-grub
>>>>>> +       ;;
>>>>>> +*)
>>>>>> +       ;;
>>>>>> +esac
>>>>>>
>>>>>>  exit 0
>>>>>>
>>>>>> But anyway I also now get another boot failure with:
>>>>>>
>>>>>> mount: mounting /dev on /root/dev failed: No such file or directory
>>>>>> mount: mounting /sys on /root/sys failed: No such file or directory
>>>>>
>>>>> Hmm...the scripts in the initrd are not doing what is expected -
>>>>> perhaps if you didn't use:
>>>>> linux$ fakeroot make-kpkg --append-to-version -luis1 --initrd kernel-image
>>>>
>>>> I am not using that to build my kernels I just build my kernels with
>>>>
>>>> make
>>>> sudo make modules_install install
>>>>
>>>>> ...or if there are eg initrd script modifications on the filesystem
>>>>> when it cooked the initd.
>>>>
>>>> I haven't modified any initrd scripts.
>>>>
>>>>> You could just try eg:
>>>>> http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.35-9-generic_2.6.35-9.14_amd64.deb
>>>
>>> Fun, so that kernel actually works but the one I am building from
>>> wireless-testing.git does not. The curious thing is it doesn't boot
>>> even if I remove my 802.11 module... so something is fishy. This is
>>> likely a config issue. After booting with the above kernel though I
>>> generated a new one with
>>>
>>> make localmodconfig
>>>
>>> and then enabled my 802.11 modules. Still, no luck.. Going to reset my
>>> tree, I had manually merged Linus' latest stuff in but I don't think
>>> this should matter.
>>
>> That didn't work, but it seems this was just my config, the same
>> config worked on older kernels but I am not motivated enough to figure
>> out what I actually did enable which fixed this. But just for the
>> record
>>
>> config which did not work:
>>
>> http://bombadil.infradead.org/~mcgrof/configs/2010/config-issue/config-old.txt
>>
>> config which worked:
>>
>> http://bombadil.infradead.org/~mcgrof/configs/2010/config-issue/config.txt
>>
>> The diff:
>>
>> http://bombadil.infradead.org/~mcgrof/configs/2010/config-issue/diff-34-35.patch
>>
>>   Luis
>>
>
> Hm, I hope I did not miss some info in the threads above, but have you tried to
> use the config in /boot/ as a base for your new config with make oldconfig?

Yeah, that's how I started my own configs for 2.6.34, then I always
use make localmodconfig to trim crap down. In this case my config just
stopped working on newer kernels. What cured it was I took Daniel J
Blueman's 2.6.35 ubuntu package:

http://archive.ubuntu.com/ubuntu/pool/main/l/linux/linux-image-2.6.35-9-generic_2.6.35-9.14_amd64.deb

Then stole that config and used it as a starting reference, then did
the localmodconfig after booting into it and cp'ing that config to my
own and running oldconfig.

> I think to remember make modules_install purges all existing modules under
> kernel before installing the new ones. So likely there is something essential
> going away when rebuilding the initrd. The messages sound like basic root fs is
> not there, so it misses all the mount points. But I admit to be too lazy to walk
> all the config.

Right, I thought it was the rootfs, the rootfs is provided through the
tmpfs filesystem which both configs have. They also have devftmpfs.
This is why I started to suspect something on the distribution side
but low and behold linux-image-2.6.35-9-generic_2.6.35-9.14_amd64.deb
worked well.

CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y

Good news is its working now but certainly my old config did not work anymore.

  Luis
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