IBM Power updates for enabling kdump

Author: alishaIBM

modules/troubleshooting-enabling-kdump-day-one.adoc

@@ -52,7 +52,7 @@ storage:
       contents:
         inline: |
           KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
-          KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug transparent_hugepage=never nokaslr novmcoredd hest_disable"
+          KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug transparent_hugepage=never nokaslr novmcoredd hest_disable" <5>
           KEXEC_ARGS="-s"
           KDUMP_IMG="vmlinuz"
 
@@ -63,9 +63,10 @@ systemd:
 ----
 +
 <1> Replace `worker` with `master` in both locations when creating a `MachineConfig` object for control plane nodes.
-<2> Provide kernel arguments to reserve memory for the crash kernel. You can add other kernel arguments if necessary.
+<2> Provide kernel arguments to reserve memory for the crash kernel. You can add other kernel arguments if necessary. For the `ppc64le` platform, the recommended value for `crashkernel` is `crashkernel=2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G`.
 <3> If you want to change the contents of `/etc/kdump.conf` from the default, include this section and modify the `inline` subsection accordingly.
 <4> If you want to change the contents of `/etc/sysconfig/kdump` from the default, include this section and modify the `inline` subsection accordingly.
+<5> For the `ppc64le` platform, replace `nr_cpus=1` with `maxcpus=1`, which is not supported on this platform.
 
 . Use Butane to generate a machine config YAML file, `99-worker-kdump.yaml`, containing the configuration to be delivered to the nodes:
 +

modules/troubleshooting-enabling-kdump.adoc

@@ -18,6 +18,11 @@ Perform the following steps to enable kdump on {op-system}.
 ----
 # rpm-ostree kargs --append='crashkernel=256M'
 ----
++
+[NOTE]
+====
+For the `ppc64le` platform, the recommended value for `crashkernel` is `crashkernel=2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G`.
+====
 
 . Optional: To write the crash dump over the network or to some other location, rather than to the default local `/var/crash` location, edit the `/etc/kdump.conf` configuration file.
 +