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Old 10-29-2010, 04:25 PM
Wawrzyniec Niewodniczański
 
Default Kernel building issue

2010/10/29 Emmanuel Benisty <benisty.e@gmail.com>:
> 2010/10/29 Wawrzyniec Niewodniczański <wawrzek@gmail.com>:
>> Any ideas what I have omitted in kernel? Ubuntu seems to work fine on the box.
>
> can you please attach:
> ** your kernel .config
> ** lspci -n
> ** cat /etc/fstab
> ** cat /proc/cpuinfo
>
Please find in attachment.

I have RAID1 with two disk

md1 (boot)
md2 (LVM2)

on LVM root and something else.

Wawrzek

--
*Wawrzyniec Niewodniczański* * * vel Wawrzek Larry or LarryN
* * Linux User #177124* * * * * * * E-MAIL: wawrzek@gmail.com
*PhD in Quantum Chemistry* * * * * * WWW: http://wawrzek.name
*MSc in Molecular Engineering* * * * ** JID: wawrzek@jabber.wroc.pl
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Old 10-29-2010, 04:54 PM
Predrag Ivanovic
 
Default Kernel building issue

On Fri, 29 Oct 2010 16:32:15 +0100
Wawrzyniec Niewodniczański wrote:

>Hi,
>
>I have tried to built a linux kernel for Dell T3500 with Intell ICH10
>chip and have been failing so far. The error seems to be related to
>AHCI. The last messages are that loop module has been loaded and next
>about controller cannot do SNFT, terminiting off CAP_SNFT
>and next controller reset failling
>and many line of
>ahcp: [...] failed to stop engines (-5).
>
>Any ideas what I have omitted in kernel? Ubuntu seems to work fine on the box.

Are you referring to this?
https://bugzilla.kernel.org/show_bug.cgi?id=16228
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/653238
http://marc.info/?l=linux-kernel&m=128476278029918&w=2

Add 'pci=nocrs' as kernel option, that shold work

According to this[1], Ubuntu patches[2] are bit too invasive, so they will probably not be merged until 2.6.37, unless Linus
has a Dell laptop too .
So, you can either try to apply Ubuntu patches to vanilla kernel and build that, or use pci=nocrs until new kernel release/Dell BIOS update comes,
because this seems to be BIOS related.

>Wawrzek

[1]https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/647043/comments/14
[2]http://people.canonical.com/~ogasawara/lp647043/

Good luck.

Pedja
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Old 11-01-2010, 10:13 AM
Wawrzyniec Niewodniczański
 
Default Kernel building issue

Hi,
Thanks Pedja for you great email. In my case it's not a laptop but
workstation, but anyway I have found that pci='nocrs' workaround
works. (BTW, Another one we found is turning off AHCI in BIOS and
leaving only ATA).

So now I have pure kernel issue - Kernel doesn't see root partition.
It gives me the list of available partition with sdaX and sdbX ones,
but not trace of RAID/LVM (and I have root on RAID/LVM). I'm pretty
sure I have compiled all necessary option to allow boot from
/dev/main/root which is on LVM on /dev/md2. I guess that RAID is fine,
cause kernel is booting from /dev/md1.

Any ideas?
Wawrzek

PS. I'm attaching my lilo.conf.

--
*Wawrzyniec Niewodniczański* * * vel Wawrzek Larry or LarryN
* * Linux User #177124* * * * * * * E-MAIL: wawrzek@gmail.com
*PhD in Quantum Chemistry* * * * * * WWW: http://wawrzek.name
*MSc in Molecular Engineering* * * * ** JID: wawrzek@jabber.wroc.pl
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Old 11-01-2010, 11:30 AM
Wawrzyniec Niewodniczański
 
Default Kernel building issue

2010/11/1 Wawrzyniec Niewodniczański <wawrzek@gmail.com>:

[...]
> /dev/main/root which is on LVM on /dev/md2. I guess that RAID is fine,
> cause kernel is booting from /dev/md1.
>

After all it might be wrong assumption. I've just checked some kernel
message from about Kernel Panic and there is something that md found
and added 0 devices...

Wawrzek
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Old 11-02-2010, 10:18 AM
Wawrzyniec Niewodniczański
 
Default Kernel building issue

2010/11/1 Wawrzyniec Niewodniczański <wawrzek@gmail.com>:
> 2010/11/1 Wawrzyniec Niewodniczański <wawrzek@gmail.com>:
>
> [...]
>> /dev/main/root which is on LVM on /dev/md2. I guess that RAID is fine,
>> cause kernel is booting from /dev/md1.
>>
>
> After all it might be wrong assumption. I've just checked some kernel
> message from about Kernel Panic and there is something that md found
> and added 0 devices...
>
I resolve my issue. The problem was partition type. When I changed it
to Raid Auto Detect the system started to boot properly.


Wawrzek

--
*Wawrzyniec Niewodniczański* * * vel Wawrzek Larry or LarryN
* * Linux User #177124* * * * * * * E-MAIL: wawrzek@gmail.com
*PhD in Quantum Chemistry* * * * * * WWW: http://wawrzek.name
*MSc in Molecular Engineering* * * * ** JID: wawrzek@jabber.wroc.pl
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Old 11-03-2010, 11:03 AM
Wawrzyniec Niewodniczański
 
Default Kernel building issue

Hi,

After another day of investigation I found that both /boot and /root
have to be on RAID array with metadata 0.90 (at least for LILO).

So now I have:

md1 - (sd{a,b}1 - boot)
md2 - (sd{a,b}2 - root)
md3 - (sd{a,b}3 - LVM)

Another thing I have found is that system doesn't add md3 automatic,
so LVM is not initialize nor partition on it. I had to add
/sbin/mdadm --assemble - scan
to /etc/rc (line 16 - before device-mapper nodes creation)

Before I'll update Wiki I would like to ensure that may finding are correct.

Cheers,
Wawrzek

--
*Wawrzyniec Niewodniczański* * * vel Wawrzek Larry or LarryN
* * Linux User #177124* * * * * * * E-MAIL: wawrzek@gmail.com
*PhD in Quantum Chemistry* * * * * * WWW: http://wawrzek.name
*MSc in Molecular Engineering* * * * ** JID: wawrzek@jabber.wroc.pl
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Old 11-03-2010, 12:57 PM
Moritz Wilhelmy
 
Default Kernel building issue

Excerpts from Wawrzyniec Niewodniczański's message of Wed Nov 03 13:03:41 +0100 2010:
> After another day of investigation I found that both /boot and /root
> have to be on RAID array with metadata 0.90 (at least for LILO).
You could also try extlinux, I think it's superior at least in RAID
environments (while being a lot smaller and more modular than GRUB)

Best regards,

Moritz
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Old 11-03-2010, 05:50 PM
Clemens Koller
 
Default Kernel building issue

Hi, Wawrzek!

Am 03.11.2010 13:03, schrieb Wawrzyniec Niewodniczański:

After another day of investigation I found that both /boot and /root
have to be on RAID array with metadata 0.90 (at least for LILO).

So now I have:

md1 - (sd{a,b}1 - boot)
md2 - (sd{a,b}2 - root)
md3 - (sd{a,b}3 - LVM)

Another thing I have found is that system doesn't add md3 automatic,
so LVM is not initialize nor partition on it. I had to add
/sbin/mdadm --assemble - scan
to /etc/rc (line 16 - before device-mapper nodes creation)

Before I'll update Wiki I would like to ensure that may finding are correct.


Feel free to update my article (mark the LVM specific changes) or create a new one.
I cannot really assist you further since I never used LVM and I have no
idea how LVM deals with RAIDs.

Did you test the RAID by hot-plugging a harddisk (SATA is usually no problem)
and rebooting the computer? LILO has to boot from each disk, no matter which
one failed. A new spare disk also needs LILO installed in the MBR...

Regards,

Clemens

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