Re: [PATCH v6 0/9] Multigenerational LRU Framework

[Donald Carr]

January 18, 2022 1:21 AM, "Yu Zhao" <yuzhao@xxxxxxxxxx> wrote:

> On Tue, Jan 11, 2022 at 01:41:22AM -0700, Yu Zhao wrote:
> 
>> On Tue, Jan 04, 2022 at 01:30:00PM -0700, Yu Zhao wrote:
>> On Tue, Jan 04, 2022 at 01:22:19PM -0700, Yu Zhao wrote:
>>> TLDR
>>> ====
>>> 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.
>> 
>> <snipped>
>> 
>>> Summery
>>> =======
>>> The facts are:
>>> 1. The independent lab results and the real-world applications
>>> indicate substantial improvements; there are no known regressions.
>>> 2. Thrashing prevention, working set estimation and proactive reclaim
>>> work out of the box; there are no equivalent solutions.
>>> 3. There is a lot of new code; nobody has demonstrated smaller changes
>>> with similar effects.
>>> 
>>> Our options, accordingly, are:
>>> 1. Given the amount of evidence, the reported improvements will likely
>>> materialize for a wide range of workloads.
>>> 2. Gauging the interest from the past discussions [14][15][16], the
>>> new features will likely be put to use for both personal computers
>>> and data centers.
>>> 3. Based on Google's track record, the new code will likely be well
>>> maintained in the long term. It'd be more difficult if not
>>> impossible to achieve similar effects on top of the existing
>>> design.
>> 
>> Hi Andrew, Linus,
>> 
>> Can you please take a look at this patchset and let me know if it's
>> 5.17 material?
>> 
>> My goal is to get it merged asap so that users can reap the benefits
>> and I can push the sequels. Please examine the data provided -- I
>> think the unprecedented coverage and the magnitude of the improvements
>> warrant a green light.
> 
> My gratitude to Donald who has been helping test MGLRU since v2:
> 
> Donald Carr (d@xxxxxxxxxxxxxxx)
> 
> Founder of Chaos Reins (http://chaos-reins.com), an SF based
> consultancy company specializing in designing/creating embedded
> Linux appliances.

Tested-by: Donald Carr <d@xxxxxxxxxxxxxxx>

> Can you please provide your Tested-by tags? This will ensure the credit
> for your contributions.
> 
> Thanks!