linux-kernel - Re: [PATCH 1/5] tracing: Add support for creating hist trigger variables from literal

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Date:   Tue, 19 Oct 2021 17:26:00 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Kalesh Singh <kaleshsingh@...gle.com>
Cc:     Suren Baghdasaryan <surenb@...gle.com>,
        Hridya Valsaraju <hridya@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Ingo Molnar <mingo@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH 1/5] tracing: Add support for creating hist trigger
 variables from literal

On Tue, 19 Oct 2021 14:21:04 -0700
Kalesh Singh <kaleshsingh@...gle.com> wrote:

> Addition and subtraction are already supported operations. The use
> case given in Documentation/trace/histogram.rst is for calculating
> latencies. I don't have a use case where the constants may be needed
> in the addition/subtraction, but for simplicity and completeness we
> support them for all operations.

Perhaps we should state that it's mostly added for completeness then.

Thanks,

-- Steve