Ubuntu
kexec-tools package

  1. Bug #828731
  2. Comment #57

Comment 57 for bug 828731

Revision history for this message
Nagaraj S D (nagarajsdjkd) wrote :

I have a setup with Ubuntu 14.04 LTS server. The /boot is not on a separate partition. I followed the kdump setup as mentioned in https://help.ubuntu.com/14.04/serverguide/kernel-crash-dump.html

After triggering the kdump, system panics but system never comeup/reboot. It get stuck at the call trace of the panic.

Some of the commands output is below it might help to understand the issue:
root@ubuntu:~# mount
/dev/mapper/350002ac01d6314e1-part1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
root@ubuntu:~#

hbauser@ubuntu:~$ ls /boot/
abi-3.13.0-24-generic grub memtest86+.bin memtest86+_multiboot.bin vmlinuz-3.13.0-24-generic
config-3.13.0-24-generic initrd.img-3.13.0-24-generic memtest86+.elf System.map-3.13.0-24-generic
hbauser@ubuntu:~$

hbauser@ubuntu:~$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=0503c0b3-1acd-4e11-a60a-f5f2618fdb6c ro crashkernel=384M-:128M
hbauser@ubuntu:~$ dmesg | grep -i crash
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=0503c0b3-1acd-4e11-a60a-f5f2618fdb6c ro crashkernel=384M-:128M
[ 0.000000] Reserving 128MB of memory at 720MB for crashkernel (System RAM: 32733MB)
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=0503c0b3-1acd-4e11-a60a-f5f2618fdb6c ro crashkernel=384M-:128M
hbauser@ubuntu:~$

In another configuration where I have installed OS with LVM and /boot on separate partition. The workaround suggested in this bug also didn't work. Am I missing something?