1config PSTORE 2 bool "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 15config PSTORE_CONSOLE 16 bool "Log kernel console messages" 17 depends on PSTORE 18 help 19 When the option is enabled, pstore will log all kernel 20 messages, even if no oops or panic happened. 21 22config PSTORE_FTRACE 23 bool "Persistent function tracer" 24 depends on PSTORE 25 depends on FUNCTION_TRACER 26 help 27 With this option kernel traces function calls into a persistent 28 ram buffer that can be decoded and dumped after reboot through 29 pstore filesystem. It can be used to determine what function 30 was last called before a reset or panic. 31 32 If unsure, say N. 33 34config PSTORE_RAM 35 tristate "Log panic/oops to a RAM buffer" 36 depends on PSTORE 37 depends on HAS_IOMEM 38 depends on HAVE_MEMBLOCK 39 select REED_SOLOMON 40 select REED_SOLOMON_ENC8 41 select REED_SOLOMON_DEC8 42 help 43 This enables panic and oops messages to be logged to a circular 44 buffer in RAM where it can be read back at some later point. 45 46 Note that for historical reasons, the module will be named 47 "ramoops.ko". 48 49 For more information, see Documentation/ramoops.txt. 50