Re: [PATCH v2 15/18] rtla: Make stop_tracing variable volatile

[Steven Rostedt]

On Tue,  6 Jan 2026 08:49:51 -0300
Wander Lairson Costa <wander@xxxxxxxxxx> wrote:

> Add the volatile qualifier to stop_tracing in both common.c and
> common.h to ensure all accesses to this variable bypass compiler
> optimizations and read directly from memory. This guarantees that
> when the signal handler sets stop_tracing, the change is immediately
> visible to the main program loop, preventing potential hangs or
> delayed shutdown when termination signals are received.

In the kernel, this is handled via the READ_ONCE() macro. Perhaps rtla
should implement that too.

-- Steve