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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.
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