From: Gabriele Monaco <gmonaco@redhat.com>
To: Nam Cao <namcao@linutronix.de>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Jonathan Corbet <corbet@lwn.net>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Cc: Tomas Glozar <tglozar@redhat.com>, Juri Lelli <jlelli@redhat.com>,
Clark Williams <williams@redhat.com>,
John Kacur <jkacur@redhat.com>
Subject: Re: [PATCH v2 15/20] rv: Convert the opid monitor to a hybrid automaton
Date: Mon, 13 Oct 2025 16:14:13 +0200 [thread overview]
Message-ID: <db32cd9db7168a28e6d16d16b3bbe905a6c2c9f9.camel@redhat.com> (raw)
In-Reply-To: <87cy6uygn9.fsf@yellow.woof>
On Fri, 2025-10-10 at 16:29 +0200, Nam Cao wrote:
> > + * If CONFIG_PREEMPTION is enabled, then the tracepoint
> > itself disables
> > + * preemption (adding one to the preempt_count). Since we
> > are
> > + * interested in the preempt_count at the time the
> > tracepoint was
> > + * hit, we consider 1 as still enabled.
> > + */
> > + if (IS_ENABLED(CONFIG_PREEMPTION))
> > + return (preempt_count() & PREEMPT_MASK) > 1;
>
> FYI, there is plan to keep preemption enabled during tracepoint
> handling. So keep that in mind when this monitor breaks.
Right, I've heard of it, thanks for the heads up. I'll adapt the monitors once
that happens.
Thanks,
Gabriele
next prev parent reply other threads:[~2025-10-13 14:14 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-19 14:09 [PATCH v2 00/20] rv: Add Hybrid Automata monitor type, per-object and deadline monitors Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 01/20] rv: Refactor da_monitor to minimise macros Gabriele Monaco
2025-10-02 8:45 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 02/20] rv: Cleanup da_monitor after refactor Gabriele Monaco
2025-10-02 8:49 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 03/20] rv: Unify DA event handling functions across monitor types Gabriele Monaco
2025-10-02 9:14 ` Nam Cao
2025-10-02 11:30 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 04/20] Documentation/rv: Adapt documentation after da_monitor refactoring Gabriele Monaco
2025-10-02 9:26 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 05/20] verification/rvgen: Adapt dot2k and templates after refactoring da_monitor.h Gabriele Monaco
2025-10-02 9:34 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 06/20] verification/rvgen: Annotate DA functions with types Gabriele Monaco
2025-10-02 9:39 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 07/20] verification/dot2c: Remove __buff_to_string() and cleanup Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 08/20] verification/dot2c: Remove superfluous enum assignment and add last comma Gabriele Monaco
2025-10-02 9:40 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 09/20] verification/rvgen: Remove unused variable declaration from containers Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 10/20] rv: Add Hybrid Automata monitor type Gabriele Monaco
2025-10-17 8:44 ` Nam Cao
2025-10-17 9:48 ` Gabriele Monaco
2025-10-17 13:05 ` Nam Cao
2025-10-17 15:22 ` Gabriele Monaco
2025-10-20 13:43 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 11/20] verification/rvgen: Allow spaces in and events strings Gabriele Monaco
2025-10-02 11:03 ` Nam Cao
2025-10-02 11:17 ` Gabriele Monaco
2025-10-06 13:20 ` Nam Cao
2025-10-06 15:22 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 12/20] verification/rvgen: Add support for Hybrid Automata Gabriele Monaco
2025-10-17 9:37 ` Nam Cao
2025-10-17 9:53 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 13/20] Documentation/rv: Add documentation about hybrid automata Gabriele Monaco
2025-10-10 13:46 ` Nam Cao
2025-10-13 8:33 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 14/20] rv: Add sample hybrid monitors stall Gabriele Monaco
2025-10-10 14:23 ` Nam Cao
2025-10-13 9:01 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 15/20] rv: Convert the opid monitor to a hybrid automaton Gabriele Monaco
2025-10-10 14:29 ` Nam Cao
2025-10-13 14:14 ` Gabriele Monaco [this message]
2025-09-19 14:09 ` [PATCH v2 16/20] sched: Export hidden tracepoints to modules Gabriele Monaco
2025-09-19 15:37 ` Steven Rostedt
2025-09-19 17:07 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 17/20] sched: Add deadline tracepoints Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 18/20] rv: Add support for per-object monitors in DA/HA Gabriele Monaco
2025-10-21 11:55 ` Nam Cao
2025-10-21 15:54 ` Gabriele Monaco
2025-10-23 12:36 ` Nam Cao
2025-10-24 9:20 ` Gabriele Monaco
2025-09-19 14:09 ` [PATCH v2 19/20] verification/rvgen: Add support for per-obj monitors Gabriele Monaco
2025-10-21 12:00 ` Nam Cao
2025-09-19 14:09 ` [PATCH v2 20/20] rv: Add deadline monitors Gabriele Monaco
2025-10-10 15:04 ` Nam Cao
2025-10-13 7:30 ` Gabriele Monaco
2025-10-21 12:05 ` [PATCH v2 00/20] rv: Add Hybrid Automata monitor type, per-object and " Nam Cao
2025-10-21 15:45 ` Gabriele Monaco
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