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authorRoss Zwisler <zwisler@chromium.org>2023-02-16 01:33:45 +0300
committerSteven Rostedt (Google) <rostedt@goodmis.org>2023-02-18 22:34:09 +0300
commit2455f0e124d317dd08d337a7550a78a224d4ba41 (patch)
treea26318d9852d06d95c8f68740fe5e3e7de3a4c1d /tools
parentd8f0ae3ebed416728077fe94698983c30d409241 (diff)
downloadlinux-2455f0e124d317dd08d337a7550a78a224d4ba41.tar.xz
tracing: 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 comments and Kconfig help messages in the tracing code still refer to this older debugfs path, so let's update them to avoid confusion. Link: https://lore.kernel.org/linux-trace-kernel/20230215223350.2658616-2-zwisler@google.com Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com> Signed-off-by: Ross Zwisler <zwisler@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/lib/api/fs/tracing_path.c4
-rw-r--r--tools/tracing/latency/latency-collector.c2
2 files changed, 3 insertions, 3 deletions
diff --git a/tools/lib/api/fs/tracing_path.c b/tools/lib/api/fs/tracing_path.c
index b8e457c841ab..7ba3e81274e8 100644
--- a/tools/lib/api/fs/tracing_path.c
+++ b/tools/lib/api/fs/tracing_path.c
@@ -14,8 +14,8 @@
#include "tracing_path.h"
static char tracing_mnt[PATH_MAX] = "/sys/kernel/debug";
-static char tracing_path[PATH_MAX] = "/sys/kernel/debug/tracing";
-static char tracing_events_path[PATH_MAX] = "/sys/kernel/debug/tracing/events";
+static char tracing_path[PATH_MAX] = "/sys/kernel/tracing";
+static char tracing_events_path[PATH_MAX] = "/sys/kernel/tracing/events";
static void __tracing_path_set(const char *tracing, const char *mountpoint)
{
diff --git a/tools/tracing/latency/latency-collector.c b/tools/tracing/latency/latency-collector.c
index 59a7f2346eab..0fd9c747d396 100644
--- a/tools/tracing/latency/latency-collector.c
+++ b/tools/tracing/latency/latency-collector.c
@@ -1584,7 +1584,7 @@ static void *do_printloop(void *arg)
/*
* Toss a coin to decide if we want to sleep before printing
* out the backtrace. The reason for this is that opening
- * /sys/kernel/debug/tracing/trace will cause a blackout of
+ * /sys/kernel/tracing/trace will cause a blackout of
* hundreds of ms, where no latencies will be noted by the
* latency tracer. Thus by randomly sleeping we try to avoid
* missing traces systematically due to this. With this option