LKML News v5.15-rc4

[RFC PATCH 0/8] mm/madvise: support process_madvise(MADV_DONTNEED) (Nadav Amit)

https://lkml.kernel.org/r/20210926161259.238054-1-namit@vmware.com

This patchset makes process_madvise() to support MADV_DONTNEED hint.

mmotm 2021-09-28-19-05 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20210929020604.DyNimbxao%akpm@linux-foundation.org

The mm-of-the-moment snapshot has been updated. 13 drop, 45 add, 37 modified. 184 patches in the broken/ in total.

[PATCH 1/2] memcg: flush stats only if updated (Shakeel Butt)

https://lkml.kernel.org/r/20210930044711.2892660-1-shakeelb@google.com

This patchset makes memcg stats updated only when needed, as it is currently flushed on every refault and reclaim iteration. For reading 8 GiB tmpfs file on zram-based swap device configured system, 63% of read time has reduced.

[RFC] mm: Optimise put_pages_list() (Matthew Wilcox)

https://lkml.kernel.org/r/20210930163258.3114404-1-willy@infradead.org

This RFC optimizes put_pages_list() by doing the operations in batch. Nevertheless, this is RFC mainly because the author didn’t evaluated the performance.

mmotm 2021-09-30-19-36 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20211001023703.54h-iZdWT%akpm@linux-foundation.org

New mmotm is uploaded. No patch dropped, 39 new patches added, 8 patches modified. 223 patches in total.

[PATCH 0/7] Implement Data Access Monitoring-based Memory Operation Schemes (SeongJae Park)

https://lkml.kernel.org/r/20211001125604.29660-1-sj@kernel.org

The DAMOS patchset has dropped its RFC tag, as DAMON has merged. This patchset allows users to manage their memory based on the real data access patterns. The patchset has quickly merged in -mm tree (https://lore.kernel.org/mm-commits/20211001233339.SV5JeiSqb%25akpm@linux-foundation.org/).

Linux 5.15-rc4 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wifo=ocAVFtoutuLQvqYyNz1r014uJD8TRPJKpVaPLrRQ@mail.gmail.com

There were hiccups due to the -Werror at the beginning of the v5.15 stabiliziation, but now seems it all stabled. Normal rc4 release. In this release set_fs() has removed from m68k.

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 2019-10-04 | ~/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 -rc4 releases in the last two years.