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yaml --- r: 140669 b: refs/heads/master c: 4a66a82 h: refs/heads/master i: 140667: 6edef02 v: v3
git-mirror · Jan 27, 2009 · b70b29c · b70b29c
1 parent dfb859b
commit b70b29c
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Showing 9 changed files with 693 additions and 7 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cc2f6d90e950b69ad31d483c19cc1d121bb25c16
+refs/heads/master: 4a66a82be78e1b6f9f83074423bf42a52251414c
diff --git a/trunk/block/Kconfig b/trunk/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