Documentation/ABI/testing/sysfs-kernel-fadump

   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.