On Fri, 2025-10-10 at 16:29 +0200, Nam Cao wrote:

quoted

+		 * 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