1config 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 17config 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 24config PSTORE_FTRACE 25 bool "Persistent function tracer" 26 depends on PSTORE 27 depends on FUNCTION_TRACER 28 depends on DEBUG_FS 29 help 30 With this option kernel traces function calls into a persistent 31 ram buffer that can be decoded and dumped after reboot through 32 pstore filesystem. It can be used to determine what function 33 was last called before a reset or panic. 34 35 If unsure, say N. 36 37config PSTORE_RAM 38 tristate "Log panic/oops to a RAM buffer" 39 depends on PSTORE 40 depends on HAS_IOMEM 41 depends on HAVE_MEMBLOCK 42 select REED_SOLOMON 43 select REED_SOLOMON_ENC8 44 select REED_SOLOMON_DEC8 45 help 46 This enables panic and oops messages to be logged to a circular 47 buffer in RAM where it can be read back at some later point. 48 49 Note that for historical reasons, the module will be named 50 "ramoops.ko". 51 52 For more information, see Documentation/ramoops.txt. 53