Add kernel kconfig option for blktrace extension. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx> --- kernel/trace/Kconfig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 8bd1d6d001d7..5f8c938e495f 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -456,6 +456,31 @@ config BLK_DEV_IO_TRACE If unsure, say N. +config BLKTRACE_EXT + bool "Support for tracing block IO actions extensions like priority" + depends on BLK_DEV_IO_TRACE + depends on BLOCK + select TRACEPOINTS + select GENERIC_TRACER + select STACKTRACE + help + Say Y here if you want to be able to trace the extended block layer + actions on a given queue. Tracing allows you to see any traffic + happening on a block device queue with this extension one can see + the request like write-zeroes and zone reset along with the request + priority. For more information (and the userspac support tools + needed), fetch the blktrace tools from: + + git://git.kernel.dk/blktrace.git + + Tracing also is possible using the ftrace interface, e.g.: + + echo 1 > /sys/block/sda/sda1/trace/enable + echo blk > /sys/kernel/debug/tracing/current_tracer + cat /sys/kernel/debug/tracing/trace_pipe + + If unsure, say N. + config KPROBE_EVENTS depends on KPROBES depends on HAVE_REGS_AND_STACK_ACCESS_API -- 2.19.1
