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Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 25131a5d5e4..4fee43c0194 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -302,6 +302,29 @@ config WORKQUEUE_TRACER For example it can help a developer to decide whether he should choose a per cpu workqueue instead of a singlethreaded one. +config BLK_DEV_IO_TRACE + bool "Support for tracing block io actions" + depends on SYSFS + select RELAY + select DEBUG_FS + select TRACEPOINTS + select TRACING + select STACKTRACE + help + Say Y here if you want to be able to trace the block layer actions + on a given queue. Tracing allows you to see any traffic happening + on a block device queue. For more information (and the userspace + 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 DYNAMIC_FTRACE bool "enable/disable ftrace tracepoints dynamically" |