Re: [PATCH] wait: don't wake up freezable wait by freezing fake signal

[Peter Zijlstra]

On Tue, Aug 22, 2023 at 03:45:47PM +0800, Ming Qian wrote:
> kernel may try to wake up task with fake signal when freezing task,
> if the task is waiting event using wait_event_freezable,
> it's better to freeze the wait, instead of breaking it.
> 
> otherwise the caller may need to retry the wait,
> maybe like below code:
> 
> 	if (rc == -ERESTARTSYS && freezing(current)) {
> 		clear_thread_flag(TIF_SIGPENDING);
> 		goto again;
> 	}

I'm not sure I get it -- is there an actual problem, or are you trying
to optimize something?