Re: [page-reclaim] Augmented Page Reclaim

[Hillf Danton <hdanton@sina.com>]

On Tue, 9 Feb 2021 13:32:58 -0800 Jesse Barnes wrote:
> > ======================
> > Augmented Page Reclaim
> > ======================
> > We would like to share a work with you and see if there is enough
> > interest to warrant a run for the mainline. This work is a part of
> > result from a decade of research and experimentation in memory
> > overcommit at Google: an augmented page reclaim that, in our
> > experience, is performant, versatile and, more importantly, simple.
> 
> Per discussion on IRC, maybe some additional background would help.
> 
> In looking at browser workloads on Chrome OS, we found that reclaim was:
> 1) too expensive in terms of CPU usage
> 2) often making poor decisions about what to reclaim

Feel free to send a patchset to LKML/MM - it can speak for itself.

> 
> This work was mainly targeted toward improving those things, with an
> eye toward interactive performance for browser workloads.
> 
> We have a few key tests we use for that, that measure tab switch times
> and number of tab discards when under memory pressure, and this
> approach significantly improves these (see Yu's data).
> 
> We do expect this approach will also be beneficial to cloud workloads,
> and so are looking for people to try it out in their environments with
> their favorite key tests or workloads.
> 
> Thanks,
> Jesse