Re: [LKP] Re: [fget] 054aa8d439: will-it-scale.per_thread_ops -5.7% regression

From: Linus Torvalds
Date: Mon Dec 13 2021 - 14:44:54 EST


On Mon, Dec 13, 2021 at 10:37 AM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> So I'll just apply the patch. Thanks for the report and the testing

Done, it's commit e386dfc56f83 ("fget: clarify and improve
__fget_files() implementation") in my tree now.

I didn't mark it as "Fixes:" or for stable, because I can't imagine
that it matters in real life.

But then it struck me that Greg has mentioned that he ends up getting
a lot of performance regression reports for people testing stable and
they can be distracting.

So I'm adding a stable cc here just so people are aware of this as a
"yeah, will-it-scale.poll2 performance regression has been reported,
has a fix available if somebody cares".

Linus