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 depends on DEBUG_FS 27 help 28 With this option kernel traces function calls into a persistent 29 ram buffer that can be decoded and dumped after reboot through 30 pstore filesystem. It can be used to determine what function 31 was last called before a reset or panic. 32 33 If unsure, say N. 34 35config PSTORE_RAM 36 tristate "Log panic/oops to a RAM buffer" 37 depends on PSTORE 38 depends on HAS_IOMEM 39 depends on HAVE_MEMBLOCK 40 select REED_SOLOMON 41 select REED_SOLOMON_ENC8 42 select REED_SOLOMON_DEC8 43 help 44 This enables panic and oops messages to be logged to a circular 45 buffer in RAM where it can be read back at some later point. 46 47 Note that for historical reasons, the module will be named 48 "ramoops.ko". 49 50 For more information, see Documentation/ramoops.txt. 51