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>

1 files changed, 46 insertions, 46 deletions

diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5.rst
index 6969652f593c..6b1b86dce476 100644
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5.rst
+++ b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5.rst
@@ -548,42 +548,42 @@ mlx5 tracepoints
 mlx5 driver provides internal tracepoints for tracking and debugging using
 kernel tracepoints interfaces (refer to Documentation/trace/ftrace.rst).
 
-For the list of support mlx5 events, check `/sys/kernel/debug/tracing/events/mlx5/`.
+For the list of support mlx5 events, check /sys/kernel/tracing/events/mlx5/
 
 tc and eswitch offloads tracepoints:
 
 - mlx5e_configure_flower: trace flower filter actions and cookies offloaded to mlx5::
 
-    $ echo mlx5:mlx5e_configure_flower >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5e_configure_flower >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     tc-6535  [019] ...1  2672.404466: mlx5e_configure_flower: cookie=0000000067874a55 actions= REDIRECT
 
 - mlx5e_delete_flower: trace flower filter actions and cookies deleted from mlx5::
 
-    $ echo mlx5:mlx5e_delete_flower >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5e_delete_flower >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     tc-6569  [010] .N.1  2686.379075: mlx5e_delete_flower: cookie=0000000067874a55 actions= NULL
 
 - mlx5e_stats_flower: trace flower stats request::
 
-    $ echo mlx5:mlx5e_stats_flower >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5e_stats_flower >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     tc-6546  [010] ...1  2679.704889: mlx5e_stats_flower: cookie=0000000060eb3d6a bytes=0 packets=0 lastused=4295560217
 
 - mlx5e_tc_update_neigh_used_value: trace tunnel rule neigh update value offloaded to mlx5::
 
-    $ echo mlx5:mlx5e_tc_update_neigh_used_value >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5e_tc_update_neigh_used_value >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u48:4-8806  [009] ...1 55117.882428: mlx5e_tc_update_neigh_used_value: netdev: ens1f0 IPv4: 1.1.1.10 IPv6: ::ffff:1.1.1.10 neigh_used=1
 
 - mlx5e_rep_neigh_update: trace neigh update tasks scheduled due to neigh state change events::
 
-    $ echo mlx5:mlx5e_rep_neigh_update >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5e_rep_neigh_update >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u48:7-2221  [009] ...1  1475.387435: mlx5e_rep_neigh_update: netdev: ens1f0 MAC: 24:8a:07:9a:17:9a IPv4: 1.1.1.10 IPv6: ::ffff:1.1.1.10 neigh_connected=1
 
@@ -592,14 +592,14 @@ Bridge offloads tracepoints:
 - mlx5_esw_bridge_fdb_entry_init: trace bridge FDB entry offloaded to mlx5::
 
     $ echo mlx5:mlx5_esw_bridge_fdb_entry_init >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u20:9-2217    [003] ...1   318.582243: mlx5_esw_bridge_fdb_entry_init: net_device=enp8s0f0_0 addr=e4:fd:05:08:00:02 vid=0 flags=0 used=0
 
 - mlx5_esw_bridge_fdb_entry_cleanup: trace bridge FDB entry deleted from mlx5::
 
     $ echo mlx5:mlx5_esw_bridge_fdb_entry_cleanup >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     ip-2581    [005] ...1   318.629871: mlx5_esw_bridge_fdb_entry_cleanup: net_device=enp8s0f0_1 addr=e4:fd:05:08:00:03 vid=0 flags=0 used=16
 
@@ -607,7 +607,7 @@ Bridge offloads tracepoints:
   mlx5::
 
     $ echo mlx5:mlx5_esw_bridge_fdb_entry_refresh >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u20:8-3849    [003] ...1       466716: mlx5_esw_bridge_fdb_entry_refresh: net_device=enp8s0f0_0 addr=e4:fd:05:08:00:02 vid=3 flags=0 used=0
 
@@ -615,7 +615,7 @@ Bridge offloads tracepoints:
   representor::
 
     $ echo mlx5:mlx5_esw_bridge_vlan_create >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     ip-2560    [007] ...1   318.460258: mlx5_esw_bridge_vlan_create: vid=1 flags=6
 
@@ -623,7 +623,7 @@ Bridge offloads tracepoints:
   representor::
 
     $ echo mlx5:mlx5_esw_bridge_vlan_cleanup >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     bridge-2582    [007] ...1   318.653496: mlx5_esw_bridge_vlan_cleanup: vid=2 flags=8
 
@@ -631,7 +631,7 @@ Bridge offloads tracepoints:
   device::
 
     $ echo mlx5:mlx5_esw_bridge_vport_init >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     ip-2560    [007] ...1   318.458915: mlx5_esw_bridge_vport_init: vport_num=1
 
@@ -639,7 +639,7 @@ Bridge offloads tracepoints:
   device::
 
     $ echo mlx5:mlx5_esw_bridge_vport_cleanup >> set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ cat /sys/kernel/tracing/trace
     ...
     ip-5387    [000] ...1       573713: mlx5_esw_bridge_vport_cleanup: vport_num=1
 
@@ -647,43 +647,43 @@ Eswitch QoS tracepoints:
 
 - mlx5_esw_vport_qos_create: trace creation of transmit scheduler arbiter for vport::
 
-    $ echo mlx5:mlx5_esw_vport_qos_create >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_vport_qos_create >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-23496   [018] .... 73136.838831: mlx5_esw_vport_qos_create: (0000:82:00.0) vport=2 tsar_ix=4 bw_share=0, max_rate=0 group=000000007b576bb3
 
 - mlx5_esw_vport_qos_config: trace configuration of transmit scheduler arbiter for vport::
 
-    $ echo mlx5:mlx5_esw_vport_qos_config >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_vport_qos_config >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-26548   [023] .... 75754.223823: mlx5_esw_vport_qos_config: (0000:82:00.0) vport=1 tsar_ix=3 bw_share=34, max_rate=10000 group=000000007b576bb3
 
 - mlx5_esw_vport_qos_destroy: trace deletion of transmit scheduler arbiter for vport::
 
-    $ echo mlx5:mlx5_esw_vport_qos_destroy >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_vport_qos_destroy >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-27418   [004] .... 76546.680901: mlx5_esw_vport_qos_destroy: (0000:82:00.0) vport=1 tsar_ix=3
 
 - mlx5_esw_group_qos_create: trace creation of transmit scheduler arbiter for rate group::
 
-    $ echo mlx5:mlx5_esw_group_qos_create >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_group_qos_create >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-26578   [008] .... 75776.022112: mlx5_esw_group_qos_create: (0000:82:00.0) group=000000008dac63ea tsar_ix=5
 
 - mlx5_esw_group_qos_config: trace configuration of transmit scheduler arbiter for rate group::
 
-    $ echo mlx5:mlx5_esw_group_qos_config >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_group_qos_config >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-27303   [020] .... 76461.455356: mlx5_esw_group_qos_config: (0000:82:00.0) group=000000008dac63ea tsar_ix=5 bw_share=100 max_rate=20000
 
 - mlx5_esw_group_qos_destroy: trace deletion of transmit scheduler arbiter for group::
 
-    $ echo mlx5:mlx5_esw_group_qos_destroy >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_esw_group_qos_destroy >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     <...>-27418   [006] .... 76547.187258: mlx5_esw_group_qos_destroy: (0000:82:00.0) group=000000007b576bb3 tsar_ix=1
 
@@ -691,56 +691,56 @@ SF tracepoints:
 
 - mlx5_sf_add: trace addition of the SF port::
 
-    $ echo mlx5:mlx5_sf_add >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_add >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     devlink-9363    [031] ..... 24610.188722: mlx5_sf_add: (0000:06:00.0) port_index=32768 controller=0 hw_id=0x8000 sfnum=88
 
 - mlx5_sf_free: trace freeing of the SF port::
 
-    $ echo mlx5:mlx5_sf_free >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_free >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     devlink-9830    [038] ..... 26300.404749: mlx5_sf_free: (0000:06:00.0) port_index=32768 controller=0 hw_id=0x8000
 
 - mlx5_sf_hwc_alloc: trace allocating of the hardware SF context::
 
-    $ echo mlx5:mlx5_sf_hwc_alloc >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_hwc_alloc >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     devlink-9775    [031] ..... 26296.385259: mlx5_sf_hwc_alloc: (0000:06:00.0) controller=0 hw_id=0x8000 sfnum=88
 
 - mlx5_sf_hwc_free: trace freeing of the hardware SF context::
 
-    $ echo mlx5:mlx5_sf_hwc_free >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_hwc_free >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u128:3-9093    [046] ..... 24625.365771: mlx5_sf_hwc_free: (0000:06:00.0) hw_id=0x8000
 
 - mlx5_sf_hwc_deferred_free : trace deferred freeing of the hardware SF context::
 
-    $ echo mlx5:mlx5_sf_hwc_deferred_free >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_hwc_deferred_free >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     devlink-9519    [046] ..... 24624.400271: mlx5_sf_hwc_deferred_free: (0000:06:00.0) hw_id=0x8000
 
 - mlx5_sf_vhca_event: trace SF vhca event and state::
 
-    $ echo mlx5:mlx5_sf_vhca_event >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_vhca_event >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u128:3-9093    [046] ..... 24625.365525: mlx5_sf_vhca_event: (0000:06:00.0) hw_id=0x8000 sfnum=88 vhca_state=1
 
 - mlx5_sf_dev_add : trace SF device add event::
 
-    $ echo mlx5:mlx5_sf_dev_add>> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_dev_add>> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u128:3-9093    [000] ..... 24616.524495: mlx5_sf_dev_add: (0000:06:00.0) sfdev=00000000fc5d96fd aux_id=4 hw_id=0x8000 sfnum=88
 
 - mlx5_sf_dev_del : trace SF device delete event::
 
-    $ echo mlx5:mlx5_sf_dev_del >> /sys/kernel/debug/tracing/set_event
-    $ cat /sys/kernel/debug/tracing/trace
+    $ echo mlx5:mlx5_sf_dev_del >> /sys/kernel/tracing/set_event
+    $ cat /sys/kernel/tracing/trace
     ...
     kworker/u128:3-9093    [044] ..... 24624.400749: mlx5_sf_dev_del: (0000:06:00.0) sfdev=00000000fc5d96fd aux_id=4 hw_id=0x8000 sfnum=88