Re: [PATCH v5 2/2] pipe: use __pipe_{lock,unlock} instead of spinlock

[Hongchen Zhang <zhanghongchen@xxxxxxxxxxx>]

On 2023/8/14 下午4:47, David Howells wrote:
> Hongchen Zhang <zhanghongchen@xxxxxxxxxxx> wrote:
>
> > -	spin_lock_irq(&pipe->rd_wait.lock);
> > +	__pipe_lock(pipe);
>
> This mustn't sleep.  post_one_notification() needs to be callable with a
> spinlock held.
Hi David,
Where is the usage scenario for post_one_notification, or what usage 
scenarios will it be used in the future?
IMO, it is not advisable for a debugging tool to affect the performance
of an syscall.
> David

--
Best Regards
Hongchen Zhang