LKML News v5.16-rc6

[PATCH v4 00/17] Optimize list lru memory consumption (Muchun Song)

https://lkml.kernel.org/r/20211213165342.74704-1-songmuchun@bytedance.com

Muchun found 6GB of memory was consumed by kmalloc-32 slab cache on a machine having 952 super blocks. That was due to list_lru_one allocation from memcg_nr_cache_ids. This patchset aims to fix the issue. According to a simple test, this reduces memory consumption under a situation from 24GiB to 4GiB.

mmotm 2021-12-13-21-28 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20211214052904.VfRYfitp0%akpm@linux-foundation.org

Andrew Morton uploaded new mmotm. It’s based on 5.16-rc5, adds 52 new patches modifies 40 patches, and drops 24 patches. In total, 296 patches in the queue.

[PATCH 00/43] Add KernelMemorySanitizer infrastructure (Alexander Potapenko)

https://lkml.kernel.org/r/20211214162050.660953-1-glider@google.com

This commit implements Kernel Memory SANitizer (KMSAN) runtime, so that people can run KMSAN kernel on a QEMU.

[RFC PATCH] psi: introduce rt property for trigger (Zhaoyang Huang)

https://lkml.kernel.org/r/1639565399-15629-1-git-send-email-huangzhaoyang@gmail.com

This patch makes PSI aware of the realtime scenario.

[PATCH 00/18 V2] Repair SWAP-over-NFS (Neil Brown)

https://lkml.kernel.org/r/163969801519.20885.3977673503103544412.stgit@noble.brown

This patchset cleans up and improve swap-via-filesystem code and make NFS works with swap-via-filesystem.

Linux 5.16-rc6 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wgWuZPhK6dgXsS42iMz4o610Uw4QXeUsTSOQheNo1tf5A@mail.gmail.com

The sixth release candidate for v5.16 came out in a quite normal form. Linus will make extra release candidate, though, due to the holidays.

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 2019-12-20 | ~/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.