[PATCH v8 00/14] Multi-Gen LRU Framework

[Linus Torvalds]

On Tue, Mar 8, 2022 at 3:48 PM Yu Zhao <yuzhao at google.com> wrote:
>
> The current page reclaim is too expensive in terms of CPU usage and it
> often makes poor choices about what to evict. This patchset offers an
> alternative solution that is performant, versatile and
> straightforward.

So apart from my complaints about asking users config questions that
simply should not be asked, I really think this just needs to start
getting merged.

We've seen several numbers on the upsides, and I don't think we'll see
any of the downsides until we try it. And I don't think there is any
question that we _shouldn't_ try it, given the numbers posted.

But yeah, I certainly _hope_ that all the benchmarking has been done
with a unified set of config values, and it's not some kind of bogus
"cherry-picked config values for this particular machine" kind of
benchmarking that has been done.

Because that isn't valid benchmarking - comparing some "tuned for this
paeticular machine or load" setup to a default one is just not worth
even setting numbers to, and debases the whole value of posting
results.

                    Linus