Red Hat Bugzilla – Bug 250177
Kernel update causes kernel panic with dmraid
Last modified: 2008-06-16 22:01:18 EDT
Description of problem:
New kernel updates use different entry on /boot/grub/grub.conf which does not
work with dmraid (mounting nvraid, to be exact). Changing grub entries to use
old root=LABEL=(something) restores functionality.
Version-Release number of selected component (if applicable):
update to mentioned kernels
earlier warning message something like "cannot mount partition root"
Created attachment 160274 [details]
Updated to kernel version 126.96.36.199-41 today. Same symptoms and workaround. I
wrote down the bootup messages on a failed boot which I'm including below:
Waiting for driver initialization
Loading dm-mod.ko module
device-mapper: ioctl: 4.11.0-ioctl (2006-10-12) initialised - email@example.com
Loading dm-mirror.ko module
Loading dm-zero.ko module
Loading dm-snapshot.ko module
Trying to resume from /dev/dm-5
Unable to access resume device (/dev/dm-5)
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Booting has failed.
Kernel panic - not syncing: Attempted to kill init!
Please upload the initrd (file /boot/initrd-188.8.131.52-41.fc7.img)
Created attachment 160628 [details]
The requested initrd file
mkinitrd may be getting the "root=" entry from /etc/fstab. Does that have the
correct information for the '/' mount point?
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/dm-3 / ext3 defaults 1 1
/dev/dm-1 /boot ext3 defaults 1 2
Looks correct to me
I'm reviewing this bug as part of the kernel bug triage project, an attempt to
isolate current bugs in the fedora kernel.
I am CC'ing myself to this bug and will try and assist you in resolving it if I can.
There hasn't been much activity on this bug for a while. Could you tell me if
you are still having problems with the latest kernel?
If the problem no longer exists then please close this bug or I'll do so in a
few days if there is no additional information lodged.
The bug still persists, although I now routinely change the 'root' entry from
/dev/dm-3 to LABEL=/ along kernel updates.
Has any dmraid developer taken a look at this? There's also one message during
the bootup which I think wasn't there before:
after 'Trying to access resume device' I get
'Unable to access resume device (/dev/dm-5)'
which implies that it can't find my swap partition in the same way it's unable
to find my root partition. Though I'm not sure if the messages were formatted
exactly as I typed above.
This thread might be of interest to you on fedora-devel:
You might want to bash heads together about this one - I'm no raid expert I'm
From my review of this ticket I can't see what dmraid controller the submitter
is using(not that it should matter with this type of error).
Can the submitter please indicate which controller is being used?
Here's the output of lspci:
00:00.0 Host bridge: nVidia Corporation nForce3 250Gb Host Bridge (rev a1)
00:01.0 ISA bridge: nVidia Corporation nForce3 250Gb LPC Bridge (rev a2)
00:01.1 SMBus: nVidia Corporation nForce 250Gb PCI System Management (rev a1)
00:02.0 USB Controller: nVidia Corporation CK8S USB Controller (rev a1)
00:02.1 USB Controller: nVidia Corporation CK8S USB Controller (rev a1)
00:02.2 USB Controller: nVidia Corporation nForce3 EHCI USB 2.0 Controller (rev a2)
00:05.0 Bridge: nVidia Corporation CK8S Ethernet Controller (rev a2)
00:06.0 Multimedia audio controller: nVidia Corporation nForce3 250Gb AC'97
Audio Controller (rev a1)
00:08.0 IDE interface: nVidia Corporation CK8S Parallel ATA Controller (v2.5)
00:0a.0 IDE interface: nVidia Corporation CK8S Serial ATA Controller (v2.5) (rev a2)
00:0b.0 PCI bridge: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge (rev a2)
00:0e.0 PCI bridge: nVidia Corporation nForce3 250Gb PCI-to-PCI Bridge (rev a2)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
01:00.0 VGA compatible controller: ATI Technologies Inc R420 JJ [Radeon X800SE]
01:00.1 Display controller: ATI Technologies Inc R420 [Radeon X800] (Secondary)
The motherboard is an Asus K8N. The raid is a mirror raid of 2 SATA disks. If I
remember correctly the chipset controller is sil 3114. For the software side I'm
using whatever my Fedora installer auto-detected (or updated thereafter?). Does
this answer you question?
This is strangely similar to 298661 which repors a problem with root on an LV
over software raid. There is a promise raid controller being used for discrete
SATA disks, not BIOS raid. This problem has been around for awhile, but
apparently not reproducible by the Fedora gurus, so not fixed.
Um, The submitter has updated the ticket with an lspci that doesn't appear to
show a RAID card in the system.
In addition, the submitter posted that the RAID controller is a sil 3114. I am
very confused about how this system is configured.
Can the submitter attach 'lspci -vv' to this ticket in addition to 'dmidecode'?
Created attachment 203391 [details]
output of 'lspci -vv'
Created attachment 203401 [details]
output of 'dmidecode'
The raid setup is a "fakeraid". If I've understood correctly, the motherboard
has the sil 3114 chipset for performing some raid functions. The raid still
needs some OS software component to perform the rest of the raid functions, and
the individual disks are visible to the OS.
Bug 298661 sounds somewhat familiar, as I tried to install FC 5 earlier on my
fakeraid. Spent a lot of time and couldn't get it to work. I was very happy with
the autodetection on Fedora 7.
Ok, I've looked over the attachments and I am confused.
I don't see the sil adapter listed in the h/w of the system. Is it enabled in
the bios? Or do you have to disable it to get the system to boot?
It is enabled in the bios. The MBR is also located on the raid and bootable. I
guess the main difference is that it doesn't hide the underlying disks from the OS.
Could I trouble you for an update - are you still having problems or have they
The symptoms are still there. Life's not that bad since the workaround is so
I'll do a distro upgrade from CD later this year and check if the problem still
persists. I'll inform you the results whatever they may be.
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