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

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Date:   Thu, 16 Feb 2023 16:08:28 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Ross Zwisler <zwisler@...omium.org>
Cc:     linux-kernel@...r.kernel.org, Ross Zwisler <zwisler@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/6] tools/kvm_stat: use canonical ftrace path

On Wed, 15 Feb 2023 15:33:48 -0700
Ross Zwisler <zwisler@...omium.org> 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@...gle.com>

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>

-- Steve