Re: [PATCH v2 0/4] perf: Make SIGTRAP and __perf_pending_irq() work on RT.

Arnaldo Carvalho de Melo
2024-03-13T14:06:50Z

On Wed, Mar 13, 2024 at 02:46:45PM +0100, Sebastian Andrzej Siewior wrote:
> On 2024-03-13 10:28:41 [-0300], Arnaldo Carvalho de Melo wrote:
> > > One part I don't get: did you let it run or did you kill it?
> >
> > If I let them run they will finish and exit, no exec_child remains.
> >
> > If I instead try to stop the loop that goes on forking the 100 of them,
> > then the exec_child remain spinning.
>
> Okay. So that problem only exists if you intervene. And you can
> reproduce this odd behaviour with my patches but not without them,
> right?

See the next message, I managed to reproduce that behaviour in a non-RT
kernel as well.

- Arnaldo