Re: [PATCH V6 02/16] rv: Add runtime reactors interface
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- Subject: Re: [PATCH V6 02/16] rv: Add runtime reactors interface
- From: Steven Rostedt <rostedt@xxxxxxxxxxx>
- Date: Wed, 20 Jul 2022 13:45:31 -0400
- Cc: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx>, Guenter Roeck <linux@xxxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Marco Elver <elver@xxxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxx>, Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>, Gabriele Paoloni <gpaoloni@xxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Clark Williams <williams@xxxxxxxxxx>, Tao Zhou <tao.zhou@xxxxxxxxx>, Randy Dunlap <rdunlap@xxxxxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-trace-devel@xxxxxxxxxxxxxxx
- In-reply-to: <d168f357-e78e-5dc6-09cd-41e6e41e1f4f@kernel.org>
- References: <cover.1658244826.git.bristot@kernel.org> <4b5f93e3186b067073c1692d4c2b50d0b42101d5.1658244826.git.bristot@kernel.org> <20220720124133.3cdd2c44@gandalf.local.home> <ba11409a-df46-8fad-61a9-256277c588c0@kernel.org> <20220720130209.65f501b1@gandalf.local.home> <d168f357-e78e-5dc6-09cd-41e6e41e1f4f@kernel.org>
On Wed, 20 Jul 2022 19:37:58 +0200
Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> wrote:
> > That has logic that looks to require a lock to protect things from changing
> > from underneath.
>
> ack, so the only variable I see we can use READ_ONCE/WRITE_ONCE is the reacting_on...
WRITE_ONCE() does not supply memory barriers, which you may need.
I'm only at patch 3, I'm not sure what the full requirements of that is.
-- Steve
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