1 What: /sys/kernel/fadump/* 2 Date: Dec 2019 3 Contact: linuxppc-dev@lists.ozlabs.org 4 Description: 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 9 What: /sys/kernel/fadump/enabled 10 Date: Dec 2019 11 Contact: linuxppc-dev@lists.ozlabs.org 12 Description: read only 13 Primarily used to identify whether the FADump is enabled in 14 the kernel or not. 15 User: Kdump service 16 17 What: /sys/kernel/fadump/registered 18 Date: Dec 2019 19 Contact: linuxppc-dev@lists.ozlabs.org 20 Description: 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. 24 User: Kdump service 25 26 What: /sys/kernel/fadump/release_mem 27 Date: Dec 2019 28 Contact: linuxppc-dev@lists.ozlabs.org 29 Description: 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 35 What: /sys/kernel/fadump/mem_reserved 36 Date: Dec 2019 37 Contact: linuxppc-dev@lists.ozlabs.org 38 Description: read only 39 Provide information about the amount of memory reserved by 40 FADump to save the crash dump in bytes. 41 42 What: /sys/kernel/fadump/hotplug_ready 43 Date: Apr 2024 44 Contact: linuxppc-dev@lists.ozlabs.org 45 Description: 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. 51 User: kexec-tools 52 53 What: /sys/kernel/fadump/bootargs_append 54 Date: May 2024 55 Contact: linuxppc-dev@lists.ozlabs.org 56 Description: read/write 57 This is a special sysfs file available to setup additional 58 parameters to be passed to capture kernel.
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