On Tue, Jan 11, 2022 at 9:41 AM Yu Zhao <yuzhao@xxxxxxxxxx> 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.
Downstream kernel maintainers who have been carrying MGLRU for more than
3 versions, can you please provide your Acked-by tags?
Having this patchset in the mainline will make your job easier :)
Alexandre - the XanMod Kernel maintainer
https://xanmod.org
Brian - the Chrome OS kernel memory maintainer
https://www.chromium.org
Jan - the Arch Linux Zen kernel maintainer
https://archlinux.org
Steven - the Liquorix kernel maintainer
https://liquorix.net
Suleiman - the ARCVM (Android downstream) kernel memory maintainer
https://chromium.googlesource.com/chromiumos/third_party/kernel
Also my gratitude to those who have helped test MGLRU:
Daniel - researcher at Michigan Tech
benchmarked memcached
Holger - who has been testing/patching/contributing to various
subsystems since ~2008
Shuang - researcher at University of Rochester
benchmarked fio and provided a report
Sofia - EDI https://www.edi.works
benchmarked the top eight memory hogs and provided reports
Can you please provide your Tested-by tags? This will ensure the credit
for your contributions.
Thanks!
Sure. Thanks for your work! Once it hits mainline, MGLRU will also
be enabled in the vanilla Arch kernel.
Acked-by: Jan Alexander Steffens (heftig) <heftig@xxxxxxxxxxxxx>
