Re: [PATCH 5.13 073/127] pipe: avoid unnecessary EPOLLET wakeups under normal loads

On Tue, Aug 24, 2021 at 10:00:33AM -0700, Linus Torvalds wrote:

On Tue, Aug 24, 2021 at 9:57 AM Sasha Levin sashal@kernel.org wrote:

...

From: Linus Torvalds torvalds@linux-foundation.org

[ Upstream commit 3b844826b6c6affa80755254da322b017358a2f4 ]

This one has an odd performance regression report associated with it.

Honestly, I don't understand the performance regression, but that's likely on me, not on the kernel test robot.

So I'd hold off on applying it for now. It *might* be some odd test robot hiccup, but ..

I'll drop it for now.

Ideally we wouldn't take it at all, but I don't think any of us wants to field "my tests have regressed!" questions for the next 5 years or so.

Thanks!