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Linux/fs/pstore/Kconfig

  1 config PSTORE
  2         tristate "Persistent store support"
  3         default n
  4         help
  5            This option enables generic access to platform level
  6            persistent storage via "pstore" filesystem that can
  7            be mounted as /dev/pstore.  Only useful if you have
  8            a platform level driver that registers with pstore to
  9            provide the data, so you probably should just go say "Y"
 10            (or "M") to a platform specific persistent store driver
 11            (e.g. ACPI_APEI on X86) which will select this for you.
 12            If you don't have a platform persistent store driver,
 13            say N.
 14 
 15 choice
 16         prompt "Choose compression algorithm"
 17         depends on PSTORE
 18         default PSTORE_ZLIB_COMPRESS
 19         help
 20           This option chooses compression algorithm.
 21 
 22 config PSTORE_ZLIB_COMPRESS
 23         bool "ZLIB"
 24         select ZLIB_DEFLATE
 25         select ZLIB_INFLATE
 26         help
 27           This option enables ZLIB compression algorithm support.
 28 
 29 config PSTORE_LZO_COMPRESS
 30         bool "LZO"
 31         select LZO_COMPRESS
 32         select LZO_DECOMPRESS
 33         help
 34           This option enables LZO compression algorithm support.
 35 
 36 config PSTORE_LZ4_COMPRESS
 37         bool "LZ4"
 38         select LZ4_COMPRESS
 39         select LZ4_DECOMPRESS
 40         help
 41           This option enables LZ4 compression algorithm support.
 42 endchoice
 43 
 44 config PSTORE_CONSOLE
 45         bool "Log kernel console messages"
 46         depends on PSTORE
 47         help
 48           When the option is enabled, pstore will log all kernel
 49           messages, even if no oops or panic happened.
 50 
 51 config PSTORE_PMSG
 52         bool "Log user space messages"
 53         depends on PSTORE
 54         help
 55           When the option is enabled, pstore will export a character
 56           interface /dev/pmsg0 to log user space messages. On reboot
 57           data can be retrieved from /sys/fs/pstore/pmsg-ramoops-[ID].
 58 
 59           If unsure, say N.
 60 
 61 config PSTORE_FTRACE
 62         bool "Persistent function tracer"
 63         depends on PSTORE
 64         depends on FUNCTION_TRACER
 65         depends on DEBUG_FS
 66         help
 67           With this option kernel traces function calls into a persistent
 68           ram buffer that can be decoded and dumped after reboot through
 69           pstore filesystem. It can be used to determine what function
 70           was last called before a reset or panic.
 71 
 72           If unsure, say N.
 73 
 74 config PSTORE_RAM
 75         tristate "Log panic/oops to a RAM buffer"
 76         depends on PSTORE
 77         depends on HAS_IOMEM
 78         depends on HAVE_MEMBLOCK
 79         select REED_SOLOMON
 80         select REED_SOLOMON_ENC8
 81         select REED_SOLOMON_DEC8
 82         help
 83           This enables panic and oops messages to be logged to a circular
 84           buffer in RAM where it can be read back at some later point.
 85 
 86           Note that for historical reasons, the module will be named
 87           "ramoops.ko".
 88 
 89           For more information, see Documentation/ramoops.txt.

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