From 32c0bd9624115041cfec31c0436995418083090a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 26 Jan 2009 16:00:40 -0200 Subject: blktrace: the ftrace interface needs CONFIG_TRACING Impact: build fix Also mention in the help text that blktrace now can be used using the ftrace interface. Reported-by: Ingo Molnar Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Ingo Molnar --- block/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'block/Kconfig') diff --git a/block/Kconfig b/block/Kconfig index 0cbb3b88b59a..7cdaa1d72252 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -50,6 +50,8 @@ config BLK_DEV_IO_TRACE 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 @@ -58,6 +60,12 @@ config BLK_DEV_IO_TRACE 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 BLK_DEV_BSG -- cgit v1.2.2 From 2db270a80b8f2238e536876cfb3987af02684df8 Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 7 Feb 2009 20:46:45 +0100 Subject: tracing/blktrace: move the tracing file to kernel/trace Impact: cleanup Move blktrace.c to kernel/trace, also move its config entry. Signed-off-by: Frederic Weisbecker Acked-by: Arnaldo Carvalho de Melo Acked-by: Jens Axboe Signed-off-by: Ingo Molnar --- block/Kconfig | 24 ------------------------ 1 file changed, 24 deletions(-) (limited to 'block/Kconfig') diff --git a/block/Kconfig b/block/Kconfig index 7cdaa1d72252..e7d12782bcfb 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -44,30 +44,6 @@ config LBD If unsure, say N. -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 BLK_DEV_BSG bool "Block layer SG support v4 (EXPERIMENTAL)" depends on EXPERIMENTAL -- cgit v1.2.2