LKML News v5.9

[PATCH RFC v2] Opportunistic memory reclaim (Andrea Righi)

https://lkml.kernel.org/r/20201005081313.732745-1-andrea.righi@canonical.com

This patch introduces new file under memcg, ‘memory.swap.reclaim’ that allow users to incur Reclaim even before the memory pressure happens, to help reducing system memory footprint and speed up hibernation/VM migration time, etc.

[PATCH v2 0/2] Add tracepoints around mmap_lock acquisition (Axel Rasmussen)

https://lkml.kernel.org/r/20201007184403.1902111-1-axelrasmussen@google.com

This patchset adds tracepoints for mmap_lock to use that for analysis of the contention.

[RFC][PATCH 0/9] [v4][RESEND] Migrate Pages in lieu of discard (Dave Hansen)

https://lkml.kernel.org/r/20201007161736.ACC6E387@viggo.jf.intel.com

This commit makes the tiered-memory operation to do migration instead of reclamation.

Linux 5.9 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wi-u86++np80GQvgDuARdt9xpBNho6SjHLmYgm8jibGag@mail.gmail.com

As expected, Linux v5.9 released. Torvalds says the changes in last week was a little bit more that he hoped, but there was no scary change. So, the merge window for v5.10 has open!

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 2018-10-12 | ~/lazybox/gnuplot/plot.py \
    --data_fmt table --type labeled-lines --xtics_rotate -90 \
    --font "Times New Roman, 5pt" --ylog --pointsize 0.3