linux-kernel - Re: [PATCH v5 1/1] blktrace: switch trace spinlock to a raw spinlock

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Message-ID: <20211220183046.7193720d@rorschach.local.home>
Date:   Mon, 20 Dec 2021 18:30:46 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Wander Costa <wcosta@...hat.com>,
        Wander Lairson Costa <wander@...hat.com>,
        open list <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH v5 1/1] blktrace: switch trace spinlock to a raw
 spinlock

On Mon, 20 Dec 2021 13:49:47 -0700
Jens Axboe <axboe@...nel.dk> wrote:

> Alright, fair enough, mistakes happen. I think the patch looks fine, my
> main dislike is that it's Yet Another things that needs special RT
> handling. But I guess that's how it is...

It's not really "yet another thing". That's because in general tracing
needs special RT handling (and a lot of other special handling, not
just RT). blktrace falls under the tracing category, and this just
falls under one more thing to make tracing work with RT.

-- Steve