--- Comment From sathe...@in.ibm.com 2016-02-18 03:18 EDT---
Provided 3.19.0-50-generic linux kernel image is not bootable in my machine,
as it does not have the ipr module in initramfs, hence failing to find the root
disk.
Steps:
1. Installed 3.19.0-50-generic kernel
2. reboot, choose the above kernel/ kexec to the above kernel
> both result in below error
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait long enough?)
- Check root= (did the system wait for the right device?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/1e999814-80ae-4ef9-89a0-c7fda8d968c5 does not exist.
Dropping to a shell!
BusyBox v1.21.1 (Ubuntu 1:1.21.0-1ubuntu1) built-in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs)
3. Tried boot back to 4.2 kernel, it is working fine
4. extracted and compared the initramfs content and found 4.2 kernel has ipr in
modules.dep whereas 3.19.0-50-generic does not have.
Pls provide updated kernel image to proceed with tests.
Thanks inadvance.
output of extracted initramfs
# grep -r ipr 4.2/*
Binary file 4.2/bin/busybox matches
Binary file 4.2/initrd.img-4.2.0-27-generic matches
Binary file 4.2/initrd.img-4.2.0-27-generic.bk matches
Binary file 4.2/lib/powerpc64le-linux-gnu/libtinfo.so.5 matches
Binary file 4.2/lib/powerpc64le-linux-gnu/libc.so.6 matches
4.2/lib/modules/4.2.0-27-generic/modules.dep:kernel/drivers/scsi/ipr.ko:
Binary file 4.2/lib/modules/4.2.0-27-generic/modules.dep.bin matches
4.2/lib/modules/4.2.0-27-generic/modules.alias:alias
pci:v1014d034Asv1014sd04C9bc*sc*i* ipr
...
4.2/lib/modules/4.2.0-27-generic/modules.alias:alias
pci:v1069dB166sv1014sd0266bc*sc*i* ipr
Binary file
4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/megaraid/megaraid_sas.ko
matches
Binary file
4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/libsas/libsas.ko matches
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/scsi/ipr.ko matches
Binary file 4.2/lib/modules/4.2.0-27-generic/kernel/drivers/net/ethernet/jme.ko
matches
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/drivers/scsi/ipr.ko
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/drivers/mtd/chips/chipreg.ko
4.2/lib/modules/4.2.0-27-generic/modules.order:kernel/net/netfilter/xt_iprange.ko
Binary file 4.2/lib/modules/4.2.0-27-generic/modules.alias.bin matches
?
# grep -r ipr 3.19/*
Binary file 3.19/bin/busybox matches
Binary file 3.19/initrd.img-3.19.0-50-generic matches
Binary file 3.19/lib/powerpc64le-linux-gnu/libtinfo.so.5 matches
Binary file 3.19/lib/powerpc64le-linux-gnu/libc.so.6 matches
Binary file
3.19/lib/modules/3.19.0-50-generic/kernel/drivers/scsi/libsas/libsas.ko matches
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/drivers/scsi/ipr.ko
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/drivers/mtd/chips/chipreg.ko
3.19/lib/modules/3.19.0-50-generic/modules.order:kernel/net/netfilter/xt_iprange.ko
#lsscsi
...
[1:2:0:0]diskIBM IPR-0 5EC29900 /dev/sdc
[1:2:1:0]diskIBM IPR-0 5EC2A800 /dev/sdd
Regards,
-Satheesh.
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[LTCTest][Kernel][OP810]Ubuntu14.04.3: kernel call trace while
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