| What: /sys/kernel/fadump/* |
| Date: Dec 2019 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: |
| The /sys/kernel/fadump/* is a collection of FADump sysfs |
| file provide information about the configuration status |
| of Firmware Assisted Dump (FADump). |
| |
| What: /sys/kernel/fadump/enabled |
| Date: Dec 2019 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: read only |
| Primarily used to identify whether the FADump is enabled in |
| the kernel or not. |
| User: Kdump service |
| |
| What: /sys/kernel/fadump/registered |
| Date: Dec 2019 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: read/write |
| Helps to control the dump collect feature from userspace. |
| Setting 1 to this file enables the system to collect the |
| dump and 0 to disable it. |
| User: Kdump service |
| |
| What: /sys/kernel/fadump/release_mem |
| Date: Dec 2019 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: write only |
| This is a special sysfs file and only available when |
| the system is booted to capture the vmcore using FADump. |
| It is used to release the memory reserved by FADump to |
| save the crash dump. |
| |
| What: /sys/kernel/fadump/mem_reserved |
| Date: Dec 2019 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: read only |
| Provide information about the amount of memory reserved by |
| FADump to save the crash dump in bytes. |
| |
| What: /sys/kernel/fadump/hotplug_ready |
| Date: Apr 2024 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: read only |
| Kdump udev rule re-registers fadump on memory add/remove events, |
| primarily to update the elfcorehdr. This sysfs indicates the |
| kdump udev rule that fadump re-registration is not required on |
| memory add/remove events because elfcorehdr is now prepared in |
| the second/fadump kernel. |
| User: kexec-tools |
| |
| What: /sys/kernel/fadump/bootargs_append |
| Date: May 2024 |
| Contact: linuxppc-dev@lists.ozlabs.org |
| Description: read/write |
| This is a special sysfs file available to setup additional |
| parameters to be passed to capture kernel. |
