Re: [PATCH v2 4/6] tools/kvm_stat: use canonical ftrace path

From: Paolo Bonzini
Date: Fri Feb 17 2023 - 06:33:15 EST


On 2/15/23 23:33, Ross Zwisler wrote:
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

A comment in kvm_stat still refers to this older debugfs path, so let's
update it to avoid confusion.

Signed-off-by: Ross Zwisler <zwisler@xxxxxxxxxx>
---
tools/kvm/kvm_stat/kvm_stat | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
index 6f28180ffeea..15bf00e79e3f 100755
--- a/tools/kvm/kvm_stat/kvm_stat
+++ b/tools/kvm/kvm_stat/kvm_stat
@@ -627,7 +627,7 @@ class TracepointProvider(Provider):
name)'.
All available events have directories under
- /sys/kernel/debug/tracing/events/ which export information
+ /sys/kernel/tracing/events/ which export information
about the specific event. Therefore, listing the dirs gives us
a list of all available events.

Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>