Description of problem: kdumpctl start failed with below error: [root@darkstar]# kdumpctl restart kdump: kexec: unloaded kdump kernel kdump: Stopping kdump: [OK] kdump: Failed to detect kdump kernel location kdump: failed to prepare for kdump bootinfo. kdump: Starting kdump: [FAILED] The kernel sits in /boot/${machine-id}/$kernel-version/linux the machine-id is set in /etc/machine-id, not sure when it is set, maybe by systemd. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Hi Dave, How do you configure Fedora so that the kernel is installed to /boot/${machine-id}/$kernel-version/linux?
Hi Coiby, I'm not sure how I did it, I usually use dnf system-upgrade so it could be created by systemd sometime during one of the upgrade.
(In reply to Dave Young from comment #2) > Hi Coiby, I'm not sure how I did it, I usually use dnf system-upgrade so it > could be created by systemd sometime during one of the upgrade. Hi Dave, I find that /bin/kernel-install which is provided by systemd-udev will load some plugins to choose the location of vmlinuz. The plugins are located in /usr/lib/kernel/install.d, for this issue, 90-loaderentry.install will check the machine id and $KERNEL_INSTALL_LAYOUT, if the latter one is "bls", the vmlinuz will be copied to /boot/$MACHINE_ID/$KERNEL_VERSION/linux. ``` ... if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then exit 0 fi if [ "$KERNEL_INSTALL_LAYOUT" != "bls" ]; then exit 0 fi ... install -g root -o root -m 0644 "$KERNEL_IMAGE" "$ENTRY_DIR_ABS/linux" || { echo "Could not copy '$KERNEL_IMAGE' to '$ENTRY_DIR_ABS/linux'." >&2 exit 1 } ... ``` By checking /bin/kernel-install, we can see if $boot/$machineid dir exist, the $KERNEL_INSTALL_LAYOUT will be set to "bls". ``` if [ -z "$layout" ]; then # Administrative decision: if not present, some scripts generate into /boot. if [ -d "$BOOT_ROOT/$MACHINE_ID" ]; then layout="bls" else layout="other" fi fi ... export KERNEL_INSTALL_LAYOUT="$layout" ... ``` I think that KDUMP_IMG should be "linux" if the machine is using machine-id. Thanks! Lichen
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