On Tue, Jan 6, 2026 at 1:05 PM Steven Rostedt <[email protected]> wrote: > > On Tue, 6 Jan 2026 08:49:51 -0300 > Wander Lairson Costa <[email protected]> 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. >
I considered that, but, in this use case, I saw no point because it didn't bring any advantage and volatile was simpler. Furthermore, as Crystal pointed out, using volatile for variables shared with signals is a pretty standard practice. > -- Steve >
