docs: ftrace: always use canonical ftrace path

The canonical location for the tracefs filesystem is at /sys/kernel/tracing.

But, from Documentation/trace/ftrace.rst:

  Before 4.1, all ftrace tracing control files were within the debugfs
  file system, which is typically located at /sys/kernel/debug/tracing.
  For backward compatibility, when mounting the debugfs file system,
  the tracefs file system will be automatically mounted at:

  /sys/kernel/debug/tracing

Many parts of Documentation still reference this older debugfs path, so
let's update them to avoid confusion.

Signed-off-by: Ross Zwisler <zwisler@google.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20230125213251.2013791-1-zwisler@google.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

13 files changed, 197 insertions, 197 deletions

diff --git a/Documentation/trace/events-msr.rst b/Documentation/trace/events-msr.rst
index 810481e530b6..35d06dc66bc2 100644
--- a/Documentation/trace/events-msr.rst
+++ b/Documentation/trace/events-msr.rst
@@ -8,7 +8,7 @@ at https://www.intel.com/sdm (Volume 3)
 
 Available trace points:
 
-/sys/kernel/debug/tracing/events/msr/
+/sys/kernel/tracing/events/msr/
 
 Trace MSR reads:
 
@@ -34,7 +34,7 @@ rdpmc
 
 The trace data can be post processed with the postprocess/decode_msr.py script::
 
-  cat /sys/kernel/debug/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
+  cat /sys/kernel/tracing/trace | decode_msr.py /usr/src/linux/include/asm/msr-index.h
 
 to add symbolic MSR names.
 
diff --git a/Documentation/trace/events-nmi.rst b/Documentation/trace/events-nmi.rst
index 9e0a7289d80a..22ac1be0ea6f 100644
--- a/Documentation/trace/events-nmi.rst
+++ b/Documentation/trace/events-nmi.rst
@@ -4,7 +4,7 @@ NMI Trace Events
 
 These events normally show up here:
 
-	/sys/kernel/debug/tracing/events/nmi
+	/sys/kernel/tracing/events/nmi
 
 
 nmi_handler
@@ -31,13 +31,13 @@ really hogging a lot of CPU time, like a millisecond at a time.
 Note that the kernel's output is in milliseconds, but the input
 to the filter is in nanoseconds!  You can filter on 'delta_ns'::
 
-	cd /sys/kernel/debug/tracing/events/nmi/nmi_handler
+	cd /sys/kernel/tracing/events/nmi/nmi_handler
 	echo 'handler==0xffffffff81625600 && delta_ns>1000000' > filter
 	echo 1 > enable
 
 Your output would then look like::
 
-	$ cat /sys/kernel/debug/tracing/trace_pipe
+	$ cat /sys/kernel/tracing/trace_pipe
 	<idle>-0     [000] d.h3   505.397558: nmi_handler: perf_event_nmi_handler() delta_ns: 3236765 handled: 1
 	<idle>-0     [000] d.h3   505.805893: nmi_handler: perf_event_nmi_handler() delta_ns: 3174234 handled: 1
 	<idle>-0     [000] d.h3   506.158206: nmi_handler: perf_event_nmi_handler() delta_ns: 3084642 handled: 1
diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst
index 8f86eef1bada..8b33850b8bf9 100644
--- a/Documentation/trace/events.rst
+++ b/Documentation/trace/events.rst
@@ -24,27 +24,27 @@ tracing information should be printed.
 ---------------------------------
 
 The events which are available for tracing can be found in the file
-/sys/kernel/debug/tracing/available_events.
+/sys/kernel/tracing/available_events.
 
 To enable a particular event, such as 'sched_wakeup', simply echo it
-to /sys/kernel/debug/tracing/set_event. For example::
+to /sys/kernel/tracing/set_event. For example::
 
-	# echo sched_wakeup >> /sys/kernel/debug/tracing/set_event
+	# echo sched_wakeup >> /sys/kernel/tracing/set_event
 
 .. Note:: '>>' is necessary, otherwise it will firstly disable all the events.
 
 To disable an event, echo the event name to the set_event file prefixed
 with an exclamation point::
 
-	# echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event
+	# echo '!sched_wakeup' >> /sys/kernel/tracing/set_event
 
 To disable all events, echo an empty line to the set_event file::
 
-	# echo > /sys/kernel/debug/tracing/set_event
+	# echo > /sys/kernel/tracing/set_event
 
 To enable all events, echo ``*:*`` or ``*:`` to the set_event file::
 
-	# echo *:* > /sys/kernel/debug/tracing/set_event
+	# echo *:* > /sys/kernel/tracing/set_event
 
 The events are organized into subsystems, such as ext4, irq, sched,
 etc., and a full event name looks like this: <subsystem>:<event>.  The
@@ -53,29 +53,29 @@ file.  All of the events in a subsystem can be specified via the syntax
 ``<subsystem>:*``; for example, to enable all irq events, you can use the
 command::
 
-	# echo 'irq:*' > /sys/kernel/debug/tracing/set_event
+	# echo 'irq:*' > /sys/kernel/tracing/set_event
 
 2.2 Via the 'enable' toggle
 ---------------------------
 
-The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy
+The events available are also listed in /sys/kernel/tracing/events/ hierarchy
 of directories.
 
 To enable event 'sched_wakeup'::
 
-	# echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
+	# echo 1 > /sys/kernel/tracing/events/sched/sched_wakeup/enable
 
 To disable it::
 
-	# echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
+	# echo 0 > /sys/kernel/tracing/events/sched/sched_wakeup/enable
 
 To enable all events in sched subsystem::
 
-	# echo 1 > /sys/kernel/debug/tracing/events/sched/enable
+	# echo 1 > /sys/kernel/tracing/events/sched/enable
 
 To enable all events::
 
-	# echo 1 > /sys/kernel/debug/tracing/events/enable
+	# echo 1 > /sys/kernel/tracing/events/enable
 
 When reading one of these enable files, there are four results:
 
@@ -126,7 +126,7 @@ is the size of the data item, in bytes.
 For example, here's the information displayed for the 'sched_wakeup'
 event::
 
-	# cat /sys/kernel/debug/tracing/events/sched/sched_wakeup/format
+	# cat /sys/kernel/tracing/events/sched/sched_wakeup/format
 
 	name: sched_wakeup
 	ID: 60
@@ -215,19 +215,19 @@ to the 'filter' file for the given event.
 
 For example::
 
-	# cd /sys/kernel/debug/tracing/events/sched/sched_wakeup
+	# cd /sys/kernel/tracing/events/sched/sched_wakeup
 	# echo "common_preempt_count > 4" > filter
 
 A slightly more involved example::
 
-	# cd /sys/kernel/debug/tracing/events/signal/signal_generate
+	# cd /sys/kernel/tracing/events/signal/signal_generate
 	# echo "((sig >= 10 && sig < 15) || sig == 17) && comm != bash" > filter
 
 If there is an error in the expression, you'll get an 'Invalid
 argument' error when setting it, and the erroneous string along with
 an error message can be seen by looking at the filter e.g.::
 
-	# cd /sys/kernel/debug/tracing/events/signal/signal_generate
+	# cd /sys/kernel/tracing/events/signal/signal_generate
 	# echo "((sig >= 10 && sig < 15) || dsig == 17) && comm != bash" > filter
 	-bash: echo: write error: Invalid argument
 	# cat filter
@@ -277,7 +277,7 @@ above points:
 
 Clear the filters on all events in the sched subsystem::
 
-	# cd /sys/kernel/debug/tracing/events/sched
+	# cd /sys/kernel/tracing/events/sched
 	# echo 0 > filter
 	# cat sched_switch/filter
 	none
@@ -287,7 +287,7 @@ Clear the filters on all events in the sched subsystem::
 Set a filter using only common fields for all events in the sched
 subsystem (all events end up with the same filter)::
 
-	# cd /sys/kernel/debug/tracing/events/sched
+	# cd /sys/kernel/tracing/events/sched
 	# echo common_pid == 0 > filter
 	# cat sched_switch/filter
 	common_pid == 0
@@ -298,7 +298,7 @@ Attempt to set a filter using a non-common field for all events in the
 sched subsystem (all events but those that have a prev_pid field retain
 their old filters)::
 
-	# cd /sys/kernel/debug/tracing/events/sched
+	# cd /sys/kernel/tracing/events/sched
 	# echo prev_pid == 0 > filter
 	# cat sched_switch/filter
 	prev_pid == 0
@@ -313,7 +313,7 @@ exists, will filter all events from tracing any task that does not have the
 PID listed in the set_event_pid file.
 ::
 
-	# cd /sys/kernel/debug/tracing
+	# cd /sys/kernel/tracing
 	# echo $$ > set_event_pid
 	# echo 1 > events/enable
 
@@ -409,14 +409,14 @@ The following commands are supported:
   specifies that this enablement happens only once::
 
 	  # echo 'enable_event:kmem:kmalloc:1' > \
-	      /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/trigger
+	      /sys/kernel/tracing/events/syscalls/sys_enter_read/trigger
 
   The following trigger causes kmalloc events to stop being traced
   when a read system call exits.  This disablement happens on every
   read system call exit::
 
 	  # echo 'disable_event:kmem:kmalloc' > \
-	      /sys/kernel/debug/tracing/events/syscalls/sys_exit_read/trigger
+	      /sys/kernel/tracing/events/syscalls/sys_exit_read/trigger
 
   The format is::
 
@@ -426,10 +426,10 @@ The following commands are supported:
   To remove the above commands::
 
 	  # echo '!enable_event:kmem:kmalloc:1' > \
-	      /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/trigger
+	      /sys/kernel/tracing/events/syscalls/sys_enter_read/trigger
 
 	  # echo '!disable_event:kmem:kmalloc' > \
-	      /sys/kernel/debug/tracing/events/syscalls/sys_exit_read/trigger
+	      /sys/kernel/tracing/events/syscalls/sys_exit_read/trigger
 
   Note that there can be any number of enable/disable_event triggers
   per triggering event, but there can only be one trigger per
@@ -448,13 +448,13 @@ The following commands are supported:
   kmalloc tracepoint is hit::
 
 	  # echo 'stacktrace' > \
-		/sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+		/sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   The following trigger dumps a stacktrace the first 5 times a kmalloc
   request happens with a size >= 64K::
 
 	  # echo 'stacktrace:5 if bytes_req >= 65536' > \
-		/sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+		/sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   The format is::
 
@@ -463,16 +463,16 @@ The following commands are supported:
   To remove the above commands::
 
 	  # echo '!stacktrace' > \
-		/sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+		/sys/kernel/tracing/events/kmem/kmalloc/trigger
 
 	  # echo '!stacktrace:5 if bytes_req >= 65536' > \
-		/sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+		/sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   The latter can also be removed more simply by the following (without
   the filter)::
 
 	  # echo '!stacktrace:5' > \
-		/sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+		/sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   Note that there can be only one stacktrace trigger per triggering
   event.
@@ -488,20 +488,20 @@ The following commands are supported:
   capture those events when the trigger event occurred::
 
 	  # echo 'snapshot if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   To only snapshot once::
 
 	  # echo 'snapshot:1 if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   To remove the above commands::
 
 	  # echo '!snapshot if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
 	  # echo '!snapshot:1 if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   Note that there can be only one snapshot trigger per triggering
   event.
@@ -519,20 +519,20 @@ The following commands are supported:
   trigger event::
 
 	  # echo 'traceoff:1 if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   To always disable tracing when nr_rq  > 1::
 
 	  # echo 'traceoff if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   To remove the above commands::
 
 	  # echo '!traceoff:1 if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
 	  # echo '!traceoff if nr_rq > 1' > \
-		/sys/kernel/debug/tracing/events/block/block_unplug/trigger
+		/sys/kernel/tracing/events/block/block_unplug/trigger
 
   Note that there can be only one traceon or traceoff trigger per
   triggering event.
diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst
index 21f01d32c959..b927fb2b94dc 100644
--- a/Documentation/trace/ftrace.rst
+++ b/Documentation/trace/ftrace.rst
@@ -830,10 +830,10 @@ Error conditions
   The extended error information and usage takes the form shown in
   this example::
 
-    # echo xxx > /sys/kernel/debug/tracing/events/sched/sched_wakeup/trigger
+    # echo xxx > /sys/kernel/tracing/events/sched/sched_wakeup/trigger
     echo: write error: Invalid argument
 
-    # cat /sys/kernel/debug/tracing/error_log
+    # cat /sys/kernel/tracing/error_log
     [ 5348.887237] location: error: Couldn't yyy: zzz
       Command: xxx
                ^
@@ -843,7 +843,7 @@ Error conditions
 
   To clear the error log, echo the empty string into it::
 
-    # echo > /sys/kernel/debug/tracing/error_log
+    # echo > /sys/kernel/tracing/error_log
 
 Examples of using the tracer
 ----------------------------
diff --git a/Documentation/trace/histogram-design.rst b/Documentation/trace/histogram-design.rst
index 088c8cce738b..5765eb3e9efa 100644
--- a/Documentation/trace/histogram-design.rst
+++ b/Documentation/trace/histogram-design.rst
@@ -14,7 +14,7 @@ tracing_map.c.
 Note: All the ftrace histogram command examples assume the working
       directory is the ftrace /tracing directory. For example::
 
-	# cd /sys/kernel/debug/tracing
+	# cd /sys/kernel/tracing
 
 Also, the histogram output displayed for those commands will be
 generally be truncated - only enough to make the point is displayed.
@@ -905,7 +905,7 @@ means it will be automatically converted into a field variable::
 
   # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0: \
           onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid)' >>
-	  /sys/kernel/debug/tracing/events/sched/sched_switch/trigger
+	  /sys/kernel/tracing/events/sched/sched_switch/trigger
 
 The diagram for the sched_switch event is similar to previous examples
 but shows the additional field_vars[] array for hist_data and shows
@@ -1112,7 +1112,7 @@ sched_switch event fields, next_pid and next_comm, to generate a
 wakeup_latency trace event.  The next_pid and next_comm event fields
 are automatically converted into field variables for this purpose::
 
-  # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,next_comm)' >> /sys/kernel/debug/tracing/events/sched/sched_switch/trigger
+  # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,next_comm)' >> /sys/kernel/tracing/events/sched/sched_switch/trigger
 
 The sched_waking hist_debug output shows the same data as in the
 previous test example::
@@ -1305,7 +1305,7 @@ and event name for the onmatch() handler::
 
 The commands below can be used to clean things up for the next test::
 
-  # echo '!hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,next_comm)' >> /sys/kernel/debug/tracing/events/sched/sched_switch/trigger
+  # echo '!hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,next_comm)' >> /sys/kernel/tracing/events/sched/sched_switch/trigger
 
   # echo '!hist:keys=pid:ts0=common_timestamp.usecs' >> events/sched/sched_waking/trigger
 
@@ -1363,13 +1363,13 @@ with the save() and snapshot() actions.  For example::
 
   # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0: \
           onmax($wakeup_lat).save(next_comm,prev_pid,prev_prio,prev_comm)' >>
-          /sys/kernel/debug/tracing/events/sched/sched_switch/trigger
+          /sys/kernel/tracing/events/sched/sched_switch/trigger
 
 or::
 
   # echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0: \
           onmax($wakeup_lat).snapshot()' >>
-          /sys/kernel/debug/tracing/events/sched/sched_switch/trigger
+          /sys/kernel/tracing/events/sched/sched_switch/trigger
 
 save() action field variable test
 ---------------------------------
diff --git a/Documentation/trace/histogram.rst b/Documentation/trace/histogram.rst
index f95459aa984f..7b7e4893b8f6 100644
--- a/Documentation/trace/histogram.rst
+++ b/Documentation/trace/histogram.rst
@@ -102,12 +102,12 @@ Documentation written by Tom Zanussi
   trigger, read its current contents, and then turn it off::
 
     # echo 'hist:keys=skbaddr.hex:vals=len' > \
-      /sys/kernel/debug/tracing/events/net/netif_rx/trigger
+      /sys/kernel/tracing/events/net/netif_rx/trigger
 
-    # cat /sys/kernel/debug/tracing/events/net/netif_rx/hist
+    # cat /sys/kernel/tracing/events/net/netif_rx/hist
 
     # echo '!hist:keys=skbaddr.hex:vals=len' > \
-      /sys/kernel/debug/tracing/events/net/netif_rx/trigger
+      /sys/kernel/tracing/events/net/netif_rx/trigger
 
   The trigger file itself can be read to show the details of the
   currently attached hist trigger.  This information is also displayed
@@ -169,13 +169,13 @@ Documentation written by Tom Zanussi
   aggregation on and off when conditions of interest are hit::
 
    # echo 'hist:keys=skbaddr.hex:vals=len:pause' > \
-      /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+      /sys/kernel/tracing/events/net/netif_receive_skb/trigger
 
     # echo 'enable_hist:net:netif_receive_skb if filename==/usr/bin/wget' > \
-      /sys/kernel/debug/tracing/events/sched/sched_process_exec/trigger
+      /sys/kernel/tracing/events/sched/sched_process_exec/trigger
 
     # echo 'disable_hist:net:netif_receive_skb if comm==wget' > \
-      /sys/kernel/debug/tracing/events/sched/sched_process_exit/trigger
+      /sys/kernel/tracing/events/sched/sched_process_exit/trigger
 
   The above sets up an initially paused hist trigger which is unpaused
   and starts aggregating events when a given program is executed, and
@@ -218,7 +218,7 @@ Extended error information
   event.  The fields that can be used for the hist trigger are listed
   in the kmalloc event's format file::
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/format
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/format
     name: kmalloc
     ID: 374
     format:
@@ -238,7 +238,7 @@ Extended error information
   the kernel that made one or more calls to kmalloc::
 
     # echo 'hist:key=call_site:val=bytes_req.buckets=32' > \
-            /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+            /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   This tells the tracing system to create a 'hist' trigger using the
   call_site field of the kmalloc event as the key for the table, which
@@ -252,7 +252,7 @@ Extended error information
   file in the kmalloc event's subdirectory (for readability, a number
   of entries have been omitted)::
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site:vals=bytes_req:sort=hitcount:size=2048 [active]
 
     { call_site: 18446744072106379007 } hitcount:          1  bytes_req:        176
@@ -292,7 +292,7 @@ Extended error information
   the trigger info, which can also be displayed by reading the
   'trigger' file::
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/trigger
     hist:keys=call_site:vals=bytes_req:sort=hitcount:size=2048 [active]
 
   At the end of the output are a few lines that display the overall
@@ -323,7 +323,7 @@ Extended error information
   command history and re-execute it with a '!' prepended::
 
     # echo '!hist:key=call_site:val=bytes_req' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   Finally, notice that the call_site as displayed in the output above
   isn't really very useful.  It's an address, but normally addresses
@@ -331,9 +331,9 @@ Extended error information
   value, simply append '.hex' to the field name in the trigger::
 
     # echo 'hist:key=call_site.hex:val=bytes_req' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site.hex:vals=bytes_req:sort=hitcount:size=2048 [active]
 
     { call_site: ffffffffa026b291 } hitcount:          1  bytes_req:        433
@@ -376,9 +376,9 @@ Extended error information
   trigger::
 
     # echo 'hist:key=call_site.sym:val=bytes_req' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site.sym:vals=bytes_req:sort=hitcount:size=2048 [active]
 
     { call_site: [ffffffff810adcb9] syslog_print_all                              } hitcount:          1  bytes_req:       1024
@@ -426,9 +426,9 @@ Extended error information
   the 'sort' parameter, along with the 'descending' modifier::
 
     # echo 'hist:key=call_site.sym:val=bytes_req:sort=bytes_req.descending' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site.sym:vals=bytes_req:sort=bytes_req.descending:size=2048 [active]
 
     { call_site: [ffffffffa046041c] i915_gem_execbuffer2 [i915]                   } hitcount:       2186  bytes_req:    3397464
@@ -467,9 +467,9 @@ Extended error information
   name, just use 'sym-offset' instead::
 
     # echo 'hist:key=call_site.sym-offset:val=bytes_req:sort=bytes_req.descending' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site.sym-offset:vals=bytes_req:sort=bytes_req.descending:size=2048 [active]
 
     { call_site: [ffffffffa046041c] i915_gem_execbuffer2+0x6c/0x2c0 [i915]                  } hitcount:       4569  bytes_req:    3163720
@@ -506,9 +506,9 @@ Extended error information
   allocated in a descending order::
 
     # echo 'hist:keys=call_site.sym:values=bytes_req,bytes_alloc:sort=bytes_alloc.descending' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=call_site.sym:vals=bytes_req,bytes_alloc:sort=bytes_alloc.descending:size=2048 [active]
 
     { call_site: [ffffffffa046041c] i915_gem_execbuffer2 [i915]                   } hitcount:       7403  bytes_req:    4084360  bytes_alloc:    5958016
@@ -549,7 +549,7 @@ Extended error information
   value 'stacktrace' for the key parameter::
 
     # echo 'hist:keys=stacktrace:values=bytes_req,bytes_alloc:sort=bytes_alloc' > \
-           /sys/kernel/debug/tracing/events/kmem/kmalloc/trigger
+           /sys/kernel/tracing/events/kmem/kmalloc/trigger
 
   The above trigger will use the kernel stack trace in effect when an
   event is triggered as the key for the hash table.  This allows the
@@ -559,7 +559,7 @@ Extended error information
   every callpath in the system that led up to a kmalloc (in this case
   every callpath to a kmalloc for a kernel compile)::
 
-    # cat /sys/kernel/debug/tracing/events/kmem/kmalloc/hist
+    # cat /sys/kernel/tracing/events/kmem/kmalloc/hist
     # trigger info: hist:keys=stacktrace:vals=bytes_req,bytes_alloc:sort=bytes_alloc:size=2048 [active]
 
     { stacktrace:
@@ -658,9 +658,9 @@ Extended error information
   keeps a per-process sum of total bytes read::
 
     # echo 'hist:key=common_pid.execname:val=count:sort=count.descending' > \
-           /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/trigger
+           /sys/kernel/tracing/events/syscalls/sys_enter_read/trigger
 
-    # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_read/hist
+    # cat /sys/kernel/tracing/events/syscalls/sys_enter_read/hist
     # trigger info: hist:keys=common_pid.execname:vals=count:sort=count.descending:size=2048 [active]
 
     { common_pid: gnome-terminal  [      3196] } hitcount:        280  count:    1093512
@@ -699,9 +699,9 @@ Extended error information
   counts for the system during the run::
 
     # echo 'hist:key=id.syscall:val=hitcount' > \
-           /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger
+           /sys/kernel/tracing/events/raw_syscalls/sys_enter/trigger
 
-    # cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist
+    # cat /sys/kernel/tracing/events/raw_syscalls/sys_enter/hist
     # trigger info: hist:keys=id.syscall:vals=hitcount:sort=hitcount:size=2048 [active]
 
     { id: sys_fsync                     [ 74] } hitcount:          1
@@ -753,9 +753,9 @@ Extended error information
   hitcount sum as the secondary key::
 
     # echo 'hist:key=id.syscall,common_pid.execname:val=hitcount:sort=id,hitcount' > \
-           /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger
+           /sys/kernel/tracing/events/raw_syscalls/sys_enter/trigger
 
-    # cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist
+    # cat /sys/kernel/tracing/events/raw_syscalls/sys_enter/hist
     # trigger info: hist:keys=id.syscall,common_pid.execname:vals=hitcount:sort=id.syscall,hitcount:size=2048 [active]
 
     { id: sys_read                      [  0], common_pid: rtkit-daemon    [      1877] } hitcount:          1
@@ -803,9 +803,9 @@ Extended error information
   can use that to filter out all the other syscalls::
 
     # echo 'hist:key=id.syscall,common_pid.execname:val=hitcount:sort=id,hitcount if id == 16' > \
-           /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/trigger
+           /sys/kernel/tracing/events/raw_syscalls/sys_enter/trigger
 
-    # cat /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/hist
+    # cat /sys/kernel/tracing/events/raw_syscalls/sys_enter/hist
     # trigger info: hist:keys=id.syscall,common_pid.execname:vals=hitcount:sort=id.syscall,hitcount:size=2048 if id == 16 [active]
 
     { id: sys_ioctl                     [ 16], common_pid: gmain           [      2769] } hitcount:          1
@@ -846,9 +846,9 @@ Extended error information
   each process::
 
     # echo 'hist:key=common_pid.execname,size:val=hitcount:sort=common_pid,size' > \
-           /sys/kernel/debug/tracing/events/syscalls/sys_enter_recvfrom/trigger
+           /sys/kernel/tracing/events/syscalls/sys_enter_recvfrom/trigger
 
-    # cat /sys/kernel/debug/tracing/events/syscalls/sys_enter_recvfrom/hist
+    # cat /sys/kernel/tracing/events/syscalls/sys_enter_recvfrom/hist
     # trigger info: hist:keys=common_pid.execname,size:vals=hitcount:sort=common_pid.execname,size:size=2048 [active]
 
     { common_pid: smbd            [       784], size:          4 } hitcount:          1
@@ -899,9 +899,9 @@ Extended error information
   much smaller number, say 256::
 
     # echo 'hist:key=child_comm:val=hitcount:size=256' > \
-           /sys/kernel/debug/tracing/events/sched/sched_process_fork/trigger
+           /sys/kernel/tracing/events/sched/sched_process_fork/trigger
 
-    # cat /sys/kernel/debug/tracing/events/sched/sched_process_fork/hist
+    # cat /sys/kernel/tracing/events/sched/sched_process_fork/hist
     # trigger info: hist:keys=child_comm:vals=hitcount:sort=hitcount:size=256 [active]
 
     { child_comm: dconf worker                        } hitcount:          1
@@ -935,9 +935,9 @@ Extended error information
   displays as [paused]::
 
     # echo 'hist:key=child_comm:val=hitcount:size=256:pause' >> \
-           /sys/kernel/debug/tracing/events/sched/sched_process_fork/trigger
+           /sys/kernel/tracing/events/sched/sched_process_fork/trigger
 
-    # cat /sys/kernel/debug/tracing/events/sched/sched_process_fork/hist
+    # cat /sys/kernel/tracing/events/sched/sched_process_fork/hist
     # trigger info: hist:keys=child_comm:vals=hitcount:sort=hitcount:size=256 [paused]
 
     { child_comm: dconf worker                        } hitcount:          1
@@ -972,9 +972,9 @@ Extended error information
   again, and the data has changed::
 
     # echo 'hist:key=child_comm:val=hitcount:size=256:cont' >> \
-           /sys/kernel/debug/tracing/events/sched/sched_process_fork/trigger
+           /sys/kernel/tracing/events/sched/sched_process_fork/trigger
 
-    # cat /sys/kernel/debug/tracing/events/sched/sched_process_fork/hist
+    # cat /sys/kernel/tracing/events/sched/sched_process_fork/hist
     # trigger info: hist:keys=child_comm:vals=hitcount:sort=hitcount:size=256 [active]
 
     { child_comm: dconf worker                        } hitcount:          1
@@ -1026,7 +1026,7 @@ Extended error information
   netif_receive_skb event::
 
     # echo 'hist:key=stacktrace:vals=len:pause' > \
-           /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+           /sys/kernel/tracing/events/net/netif_receive_skb/trigger
 
   Next, we set up an 'enable_hist' trigger on the sched_process_exec
   event, with an 'if filename==/usr/bin/wget' filter.  The effect of
@@ -1037,7 +1037,7 @@ Extended error information
   hash table keyed on stacktrace::
 
     # echo 'enable_hist:net:netif_receive_skb if filename==/usr/bin/wget' > \
-           /sys/kernel/debug/tracing/events/sched/sched_process_exec/trigger
+           /sys/kernel/tracing/events/sched/sched_process_exec/trigger
 
   The aggregation continues until the netif_receive_skb is paused
   again, which is what the following disable_hist event does by
@@ -1045,7 +1045,7 @@ Extended error information
   filter 'comm==wget'::
 
     # echo 'disable_hist:net:netif_receive_skb if comm==wget' > \
-           /sys/kernel/debug/tracing/events/sched/sched_process_exit/trigger
+           /sys/kernel/tracing/events/sched/sched_process_exit/trigger
 
   Whenever a process exits and the comm field of the disable_hist
   trigger filter matches 'comm==wget', the netif_receive_skb hist
@@ -1058,7 +1058,7 @@ Extended error information
 
     $ wget https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.19.xz
 
-    # cat /sys/kernel/debug/tracing/events/net/netif_receive_skb/hist
+    # cat /sys/kernel/tracing/events/net/netif_receive_skb/hist
     # trigger info: hist:keys=stacktrace:vals=len:sort=hitcount:size=2048 [paused]
 
     { stacktrace:
@@ -1142,12 +1142,12 @@ Extended error information
   again, we can just clear the histogram first::
 
     # echo 'hist:key=stacktrace:vals=len:clear' >> \
-           /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+           /sys/kernel/tracing/events/net/netif_receive_skb/trigger
 
   Just to verify that it is in fact cleared, here's what we now see in
   the hist file::
 
-    # cat /sys/kernel/debug/tracing/events/net/netif_receive_skb/hist
+    # cat /sys/kernel/tracing/events/net/netif_receive_skb/hist
     # trigger info: hist:keys=stacktrace:vals=len:sort=hitcount:size=2048 [paused]
 
     Totals:
@@ -1162,21 +1162,21 @@ Extended error information
   sched_process_exit events as such::
 
     # echo 'enable_event:net:netif_receive_skb if filename==/usr/bin/wget' > \
-           /sys/kernel/debug/tracing/events/sched/sched_process_exec/trigger
+           /sys/kernel/tracing/events/sched/sched_process_exec/trigger
 
     # echo 'disable_event:net:netif_receive_skb if comm==wget' > \
-           /sys/kernel/debug/tracing/events/sched/sched_process_exit/trigger
+           /sys/kernel/tracing/events/sched/sched_process_exit/trigger
 
   If you read the trigger files for the sched_process_exec and
   sched_process_exit triggers, you should see two triggers for each:
   one enabling/disabling the hist aggregation and the other
   enabling/disabling the logging of events::
 
-    # cat /sys/kernel/debug/tracing/events/sched/sched_process_exec/trigger
+    # cat /sys/kernel/tracing/events/sched/sched_process_exec/trigger
     enable_event:net:netif_receive_skb:unlimited if filename==/usr/bin/wget
     enable_hist:net:netif_receive_skb:unlimited if filename==/usr/bin/wget
 
-    # cat /sys/kernel/debug/tracing/events/sched/sched_process_exit/trigger
+    # cat /sys/kernel/tracing/events/sched/sched_process_exit/trigger
     enable_event:net:netif_receive_skb:unlimited if comm==wget
     disable_hist:net:netif_receive_skb:unlimited if comm==wget
 
@@ -1192,7 +1192,7 @@ Extended error information
   saw in the last run, but this time you should also see the
   individual events in the trace file::
 
-    # cat /sys/kernel/debug/tracing/trace
+    # cat /sys/kernel/tracing/trace
 
     # tracer: nop
     #
@@ -1226,15 +1226,15 @@ Extended error information
   other things::
 
     # echo 'hist:keys=skbaddr.hex:vals=len if len < 0' >> \
-           /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+           /sys/kernel/tracing/events/net/netif_receive_skb/trigger
     # echo 'hist:keys=skbaddr.hex:vals=len if len > 4096' >> \
-           /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+           /sys/kernel/tracing/events/net/netif_receive_skb/trigger
     # echo 'hist:keys=skbaddr.hex:vals=len if len == 256' >> \
-           /sys/kernel/debug/tracing/events/net/netif_receive_skb/trigger
+           /sys/kernel/tracing/events/net/netif_receive_skb/trigger
     # echo 'hist:keys=skbaddr.hex:vals=len' >> \
-