Add kernel kconfig option for blktrace extension.
Signed-off-by: Chaitanya Kulkarni <[email protected]>
---
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
