LSFMMBPF proposal [MM]: Lazy RCU memory reclaim

LSFMMBPF proposal [MM]: Lazy RCU memory reclaim

[Joel Fernandes]

Title: Lazy RCU memory reclaim: Design, mainlining and next steps

Description:
Lazy RCU is a new technique introducing multi-second delays in RCU memory
reclaim, done to save power on Android and ChromeOS.

This talk is to describe the internals of how this works, and issues
encountered. We will also discuss the mainlining of the patches, and future
work. It is desired to also garner more interest in the -mm community and
spread awareness of this work, including future work:

 * Delaying reclaim for other flavors of RCU (such as SRCU).

 * Possible integration of delayed free'ing into the slab (FreeBSD does this
   for their equivalent of RCU, for instance).

 * Development of tooling to monitor RCU activity (BPF or otherwise).

 * Any positive or negative effects on usecases we should know about (per-VMA
   locks, BPF etc).


thanks,

 - Joel

Re: LSFMMBPF proposal [MM]: Lazy RCU memory reclaim

[Joel Fernandes]

Hello,

> Title: Lazy RCU memory reclaim

I uploaded my slides to Google doc and opened it up for comment-level
access to everyone. Feel free to take a look or comment prior to my
talk: http://bit.ly/lsfmm23_rcu

It would be great to add the link to the schedule so that conference
attendees can view the slides in advance if they want to. I could not
find a way to do that, optionally - could the mm track or conference
organizers add the slides link under my talk to the schedule document?

thanks,

 - Joel