#915525 kdump-tools: no kernel dump is generated

Package:
kdump-tools
Source:
kdump-tools
Description:
scripts and tools for automating kdump (Linux crash dumps)
Submitter:
fulvio ciriaco
Date:
2018-12-04 12:42:04 UTC
Severity:
important
#915525#5
Date:
2018-12-04 12:39:21 UTC
From:
To:
kdump-tools does not create any core when I attempt to trigger a panic.
I see the hd lights flashing, probably because the kernel is being loaded,
but then, I never find anything in /var/crash.

root@mozart:/var/crash# kdump-config test
USE_KDUMP:         1
KDUMP_SYSCTL:      kernel.panic_on_oops=1
KDUMP_COREDIR:     /var/crash
crashkernel addr:  0x24000000
kdump kernel addr:
kdump kernel:
   /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.18.0-2-amd64
kdump initrd:
   /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.18.0-2-amd64
kexec command to be used:
  /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.18.0-2-amd64 root=UUID=25ddc407-30ce-4dc1-8e68-11b7d4316955 ro quiet nr_cpus=1 systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz

root@mozart:/var/crash# kdump-config status
current state   : ready to kdump

df -h /var/crash/
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda5        30G   24G  4.3G  85% /

Many thanks
Fulvio Ciriaco