Re: [PATCH v2] pipe: use __pipe_{lock,unlock} instead of spinlock
From: Andrew Morton
Date: Thu Jan 05 2023 - 21:59:25 EST
On Tue, 3 Jan 2023 14:33:03 +0800 Hongchen Zhang <zhanghongchen@xxxxxxxxxxx> wrote:
> Use spinlock in pipe_read/write cost too much time,IMO
> pipe->{head,tail} can be protected by __pipe_{lock,unlock}.
> On the other hand, we can use __pipe_lock/unlock to protect the
> pipe->head/tail in pipe_resize_ring and post_one_notification.
Can you please test this with the test code in Linus's 0ddad21d3e99 and
check that performance is good?