LKML News v5.12-rc5

[PATCH 0/3 v5] Introduce a bulk order-0 page allocator (Mel Gorman)

https://lkml.kernel.org/r/20210322091845.16437-1-mgorman@techsingularity.net

Fifth version of the order-0 pages bulk allocator. In this version, the API users are dropped from the patchset, because the callers are not confirmed if they prefer an array or list interface.

[PATCH] mm: cma: add trace events for CMA alloc perf testing (Georgi Djakov)

https://lkml.kernel.org/r/20210324160740.15901-1-georgi.djakov@linaro.org

This patch adds tracepoints for CMA and page migrations. Those aims to be used for performance debugging of CMA.

[PATCH 0/4] mm/page_reporting: Some knobs and fixes (Xunlei Pang)

https://lkml.kernel.org/r/1616751898-58393-1-git-send-email-xlpang@linux.alibaba.com

This commit adds some counters for debugging and fix of a problem in the page reporting feature.

Linux 5.12-rc5 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wg89U6PLp1AGhaqUx4KAZtkvKS6kuNmb+zObQhf1jez+g@mail.gmail.com

Unlike previous week’s release, rc5 is bigger than average. It’s not hitting any record, though. Torvalds says he doesn’t overly worrying, but thinking about rc8. io_uring is pointed out as one of the sources of noises.

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 2019-03-29 | ~/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 -rc5 releases in the last two years.