fs/pstore/Kconfig

   1 config PSTORE
   2         tristate "Persistent store support"
   3         default n
   4         select ZLIB_DEFLATE
   5         select ZLIB_INFLATE
   6         help
   7            This option enables generic access to platform level
   8            persistent storage via "pstore" filesystem that can
   9            be mounted as /dev/pstore.  Only useful if you have
  10            a platform level driver that registers with pstore to
  11            provide the data, so you probably should just go say "Y"
  12            (or "M") to a platform specific persistent store driver
  13            (e.g. ACPI_APEI on X86) which will select this for you.
  14            If you don't have a platform persistent store driver,
  15            say N.
  16
  17 config PSTORE_CONSOLE
  18         bool "Log kernel console messages"
  19         depends on PSTORE
  20         help
  21           When the option is enabled, pstore will log all kernel
  22           messages, even if no oops or panic happened.
  23
  24 config PSTORE_PMSG
  25         bool "Log user space messages"
  26         depends on PSTORE
  27         help
  28           When the option is enabled, pstore will export a character
  29           interface /dev/pmsg0 to log user space messages. On reboot
  30           data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
  31
  32           If unsure, say N.
  33
  34 config PSTORE_FTRACE
  35         bool "Persistent function tracer"
  36         depends on PSTORE
  37         depends on FUNCTION_TRACER
  38         depends on DEBUG_FS
  39         help
  40           With this option kernel traces function calls into a persistent
  41           ram buffer that can be decoded and dumped after reboot through
  42           pstore filesystem. It can be used to determine what function
  43           was last called before a reset or panic.
  44
  45           If unsure, say N.
  46
  47 config PSTORE_RAM
  48         tristate "Log panic/oops to a RAM buffer"
  49         depends on PSTORE
  50         depends on HAS_IOMEM
  51         depends on HAVE_MEMBLOCK
  52         select REED_SOLOMON
  53         select REED_SOLOMON_ENC8
  54         select REED_SOLOMON_DEC8
  55         help
  56           This enables panic and oops messages to be logged to a circular
  57           buffer in RAM where it can be read back at some later point.
  58
  59           Note that for historical reasons, the module will be named
  60           "ramoops.ko".
  61
  62           For more information, see Documentation/ramoops.txt.