LKML News v5.13-rc3

RCU tests for Maple Tree (Paul E. McKenney)

https://lkml.kernel.org/r/20210517154048.GA2013926@paulmck-ThinkPad-P17-Gen-1

Paul is asking if there are rcu-related tests for Maple Tree other than rcu_loop() and rcu_val() that Paul needs to looking for.

[PATCH v20 0/7] mm: introduce memfd_secret system call to create “secret” memory areas (Mike Rapoport)

https://lkml.kernel.org/r/20210518072034.31572-1-rppt@kernel.org

The 20th version of the patchset that implements ‘secret’ mappings backed by a file descriptor.

[PATCH v3 00/14] Multigenerational LRU Framework (Yu Zhao)

https://lkml.kernel.org/r/20210520065355.2736558-1-yuzhao@google.com

Third version of multi-gen LRU patchset is posted. No many changes but fixed a bug and rebased on v5.13-rc2.

[LSF/MM TOPIC] mm documentation (Mike Rapoport)

https://lkml.kernel.org/r/YKYkKTZsWZg88tWd@kernel.org

Another LSF/MM topic proposal for improving documentation of MM.

Linux 5.13-rc3 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wiUwtRp+jjCMd9x8O90iD_YHVBQzJoKCsT9e06L7qob3Q@mail.gmail.com

Unlike the expectation, this week’s release is very small. This is interesting because rc3 is usually the time real fixes coming in. However, this is the smallest rc3 in the 5.x series. Would not because there is no problem at all, but people are not sending fixes yet.

Below is the diffstat of the releases in the last two years.

Note that the y-axis is in logarithm. I draw it using https://github.com/sjp38/relstat and https://github.com/sjp38/lazybox using below command:

$ relstat.py --since 2019-05-24 | ~/lazybox/gnuplot/plot.py \
    --data_fmt table --type labeled-lines --xtics_rotate -90 \
    --font "Times New Roman, 5pt" --ylog --pointsize 0.3

And, below is the diffstat of the -rc2 releases in the last two years.