Red Hat Bugzilla – Bug 56938
cannot upgrade kernel from 2.2.19-6.2.1 to 2.2.19-6.2.12
Last modified: 2005-10-31 17:00:50 EST
From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 4.0; Q312461) Description of problem: I tried to upgrade my kernel via rpm from 2.2.19-6.2.1 to 2.2.19-6.2.12, but upon reboot I got a "kernel panic: cannot open root device 30:01" error. My root device (and only HD, BTW) is on device 30:01, i.e. on a Mylex RAID controller that requires the DAC960 scsi driver compiled into the kernel: I cannot see any sign of detection of the controller, so I suspect the driver has not been compiled in this version of the kernel Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. install the 2.2.19-6.2.12 kernel RPMs on a machine that boots from a "Mylex DAC960PTL1 PCI RAID Controller" (as reported from the DAC 960 driver version 2.2.11) 2. install lilo and reboot Actual Results: the machine couldn't boot anymore Expected Results: A normal boot sequence Additional info:
Just as with 2.2.19-6.2.1 you have to make an initrd and use that in lilo.conf... can you check if you have done that ?
Sorry I didn't mention it in my first post: I did make an initrd file and configured lilo.conf to use it. I do not know hot to check if everything went fine with initrd creation and/or if the system is using it during the boot sequence. I can send you the output of mkinitrd -v command: [root@myhost /root]# mkinitrd -v /boot/initrd-2.2.19-6.2.12.img 2.2.19-6.2.12 Using modules: scsi/atp870u.o Using loopback device /dev/loop0 /bin/ash.static -> /tmp/initrd.26227/bin/sh /sbin/insmod.static -> /tmp/initrd.26227/bin/insmod /lib/modules/2.2.19-6.2.12/scsi/atp870u.o -> /tmp/initrd.26227/lib/atp870u.o Loading module atp870u with options I cannot see any sign about DAC960 module; the command instead includes the driver of the 'other' SCSI card installed: but that one is only used for a SCSI tape, not for booting. Do you think I should try to include DAC960 in the initrd file using the --with switch? I was thinking at something like mkinitrd /boot/initrd-2.2.19-6.2.12.img 2.2.19-6.2.12 --with=DAC960 --omit-scsi- modules
mkinitrd uses /etc/modules.conf to see which scsi modules need loading; can you check if the dac960 driver is listed in that ?
[root@myhost /root]# cat /etc/modules.conf alias scsi_hostadapter atp870u alias eth0 rtl8139 alias scsi_hostadapter1 DAC960
Hrm. That should be enough to get mkinitrd to put it in the initrd... sigh The --with DAC960 switch is worth a try
This morning I rebooted the machine using the new initrd file created using -- with=DAC960 switch: everything is working fine now. If I can help you to further investigate the problem with mkinitrd please let me know. From now on I will (try to) remember to use the switch whenever I will install a new kernel.
As this appears to be a mkinitrd bug, I'm changing the component of the bug to mkinitrd as the kernel isn't going to fix that ;)
true -- hopefully massimo is still around? if so, could you try running mkinitrd without --with, but add -v to i, and post the output here?
This is the output of mkinitrd -v that ewt@redhat.com requested # mkinitrd /boot/test.img 2.2.19-6.2.12 -v Using modules: block/DAC960.o scsi/atp870u.o Using loopback device /dev/loop0 /bin/ash.static -> /tmp/initrd.15518/bin/sh /sbin/insmod.static -> /tmp/initrd.15518/bin/insmod /lib/modules/2.2.19-6.2.12/block/DAC960.o -> /tmp/initrd.15518/lib/DAC960.o /lib/modules/2.2.19-6.2.12/scsi/atp870u.o -> /tmp/initrd.15518/lib/atp870u.o Loading module DAC960 with options Loading module atp870u with options I also tried mkinitrd /boot/test2.img 2.2.19-6.2.12 --with=DAC960 --omit-scsi-modules -v Using modules: block/DAC960.o Using loopback device /dev/loop0 /bin/ash.static -> /tmp/initrd.15820/bin/sh /sbin/insmod.static -> /tmp/initrd.15820/bin/insmod /lib/modules/2.2.19-6.2.12/block/DAC960.o -> /tmp/initrd.15820/lib/DAC960.o sed: can't read /etc/conf.modules: No such file or directory Loading module DAC960 with options So apparently mkinitrd is looking for /etc/conf.modules, but I only have /etc/modules.conf Hope this helps
Hmmm... mkinitrd should prefer modules.conf to conf.modules.. don't know where that's coming from. Could you run both of those with "sh -x mkinitrd <your-options>" and mail the output, along with the resulting initrd images, directly to me at ewt@redhat.com?
I have just emailed you the info requested
Got it -- thanks. You're running a very old version of mkinitrd (it looks like version 2.3, which is from 1999)... The conf.modules problem you're seeing is a relic from that as far as I can tell. I don't know if either of the test images you sent me work or not; I'm guessing that the one created with the --with switch works, and the other one doesn't? The only difference between them is that the disk created w/ --with does not try to load atp870u. I suspect this is actually a bug, but it's pretty irrelevant. If the module that tries to load atp870u prevents your system from booting, it's a problem with that module being loaded so early in the boot sequence. Please let me know if the initrd created w/o the --with=DAC960 doesn't work while the other one does. If that is the case, this is a kernel bug with that module. If neither works, it's probably still a kernel bug.
Guess things work? Closing bug due to inactivity.