Re: [PATCH 2/2] io_uring: use TWA_SIGNAL for task_work if the task isn't running

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On 08/11, Peter Zijlstra wrote:
>
> On Tue, Aug 11, 2020 at 08:45:16AM +0200, Oleg Nesterov wrote:
> >
> > ->jobctl is always modified with ->siglock held, do we really need
> > WRITE_ONCE() ?
>
> In theory, yes. The compiler doesn't know about locks, it can tear
> writes whenever it feels like it.

Yes, but why does this matter? Could you spell please?

Oleg.




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