LKML News v6.3-rc3

[LSF/MM/BPF TOPIC] SLOB+SLAB allocators removal and future SLUB improvements (Vlastimil Babka)

https://lkml.kernel.org/r/4b9fc9c6-b48c-198f-5f80-811a44737e5f@suse.cz

Linux kernel has three objects allocators, namely SLOB, SLAB, and SLUB. Vlastimil and many developers have tried to make it only one single allocator. Deprecation of SLOB has made some progress so far. Vlastimil proposes an LSF/MM/BPF topic for discussing deprecation of SLAB and SLUB futur eimprovement.

[GIT PULL] hotfixes for 6.3-rc1 (Andrew Morton)

https://lkml.kernel.org/r/20230314165437.a2d992731a970582fe36aaba@linux-foundation.org

Yet another mm subsystem hotfixes pull request has sent to Linus Torvalds. It contains hotfixes for DAMON, too.

[PATCH linux-next] mm: workingset: simplify the calculation of workingset size (Yang Yang)

https://lkml.kernel.org/r/202303161723055514455@zte.com.cn

This patch refactor working set size calculation code which has been unnecessarily complex after the anonymous LRU workingset detection implementation.

[PATCH v2 0/6] remove SLOB and allow kfree() with kmem_cache_alloc() (Vlastimil Babka)

https://lkml.kernel.org/r/20230317104307.29328-1-vbabka@suse.cz

SLOB has deprected in 6.2. Vlastimil tries to further remove it completely immediately for-next, and from v6.4.

Linux 6.3-rc3 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wiPd8R8-zSqTOtJ9KYeZLBByHug7ny3rgP-ZqzpP_KELg@mail.gmail.com

After the one week, third release candidate for Linux v6.3 has out. It’s unusually huge due to big changes for git-ignore scripts removal and kvm selftests cleanups. Other than those, nothing unusual, so not real worrisome release.

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 2021-03-20 | ~/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 -rc3 releases in the last two years.