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