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Linux/fs/pstore/Kconfig

  1 config PSTORE
  2         bool "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.

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