1What: /sys/kernel/fadump/* 2Date: Dec 2019 3Contact: linuxppc-dev@lists.ozlabs.org 4Description: 5 The /sys/kernel/fadump/* is a collection of FADump sysfs 6 file provide information about the configuration status 7 of Firmware Assisted Dump (FADump). 8 9What: /sys/kernel/fadump/enabled 10Date: Dec 2019 11Contact: linuxppc-dev@lists.ozlabs.org 12Description: read only 13 Primarily used to identify whether the FADump is enabled in 14 the kernel or not. 15User: Kdump service 16 17What: /sys/kernel/fadump/registered 18Date: Dec 2019 19Contact: linuxppc-dev@lists.ozlabs.org 20Description: read/write 21 Helps to control the dump collect feature from userspace. 22 Setting 1 to this file enables the system to collect the 23 dump and 0 to disable it. 24User: Kdump service 25 26What: /sys/kernel/fadump/release_mem 27Date: Dec 2019 28Contact: linuxppc-dev@lists.ozlabs.org 29Description: write only 30 This is a special sysfs file and only available when 31 the system is booted to capture the vmcore using FADump. 32 It is used to release the memory reserved by FADump to 33 save the crash dump. 34 35What: /sys/kernel/fadump/mem_reserved 36Date: Dec 2019 37Contact: linuxppc-dev@lists.ozlabs.org 38Description: read only 39 Provide information about the amount of memory reserved by 40 FADump to save the crash dump in bytes. 41 42What: /sys/kernel/fadump/hotplug_ready 43Date: Apr 2024 44Contact: linuxppc-dev@lists.ozlabs.org 45Description: read only 46 Kdump udev rule re-registers fadump on memory add/remove events, 47 primarily to update the elfcorehdr. This sysfs indicates the 48 kdump udev rule that fadump re-registration is not required on 49 memory add/remove events because elfcorehdr is now prepared in 50 the second/fadump kernel. 51User: kexec-tools 52 53What: /sys/kernel/fadump/bootargs_append 54Date: May 2024 55Contact: linuxppc-dev@lists.ozlabs.org 56Description: read/write 57 This is a special sysfs file available to setup additional 58 parameters to be passed to capture kernel. 59