LKML News v6.8-rc6

[PATCH V2 0/2] Introduce slabinfo version 2.2 (Fangzheng Zhang)

https://lkml.kernel.org/r/20240219031911.10372-1-fangzheng.zhang@unisoc.com

This patchset updates slabinfo to version 2.2 and adds slabreclaim column for recording whether each slab pool is reclaim type.

[RFC PATCH 0/3] make the hugetlb migration strategy consistent (Baolin Wang)

https://lkml.kernel.org/r/cover.1708507022.git.baolin.wang@linux.alibaba.com

Falling back to other NUMA nodes when migrating freed hugetlb is prevented while it is allowed for in-use hugetlb. This patchset make it more clear and consistent.

[Invitation] Linux MM Alignment Session on Cold Page Detection on Wednesday (David Rientjes)

https://lkml.kernel.org/r/aa854cdd-469a-5dff-9b1c-2df8de5c0a55@google.com

David hosts next MM alignment session with topic of cod page detection that made with MGLRU, and extending virtio balloon with the information for in-guest use.

[PATCH v4 00/36] Memory allocation profiling (Suren Baghdasaryan)

https://lkml.kernel.org/r/20240221194052.927623-1-surenb@google.com

Surent posted the fourth version of the code tagging based memory allocation profiling patchset based on the comments on the third version.

[LSF/MM/BPF TOPIC] Hugetlb Unifications (Peter Xu)

https://lkml.kernel.org/r/ZdcKwK7CXgEsm-Co@x1n

Peter porposes an LSFMM topic for discussion on making hugetlb more easy to be maintained, since it was having its own code paths in core mm due to legacy reasons, and it is making maintenance more difficult.

[LSF/MM/BPF TOPIC] Dynamic Growth of Kernel Stacks (Pasha Tatashin)

https://lkml.kernel.org/r/CA+CK2bBYt9RAVqASB2eLyRQxYT5aiL0fGhUu3TumQCyJCNTWvw@mail.gmail.com

Pasha introduces Google is maintaining 8K kernel stack to conserve memory while the upstream is using 16K kernel stack since 2014. But Google also getting problems at the too small stack size and gonna increase the size. For more efficiency, Pasha proposes dynamic kernel stack size as a topic for LSFMM.

[GIT PULL] hotfixes for 6.8-rc6 (Andrew Morton)

https://lkml.kernel.org/r/20240222150609.61c32cf2ababec81509bf5fc@linux-foundation.org

Andrew sent hotfixes of mm subsystem for 6.8-rc6 to Linus Torvalds

[PATCH RFC] mm: madvise: pageout: ignore references rather than clearing young (Barry Song)

https://lkml.kernel.org/r/20240223041550.77157-1-21cnbao@gmail.com

Barry sent an RFC making MADV_PAGEOUT to not clear PTE accessed bit. It adds a parameter for ignoring the reference on reclaim_folio_list(), and modify the call from madivise() to do ignore the references, while keeping the call from DAMON paddr operations set to not ignore the references.

Linux 6.8-rc6 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=whZ=iA6DhijePcW-pJjZ8YD4T5qLpLKVSUT+4gWNm_0sA@mail.gmail.com

After another week, the sixth release candidate for Linux v6.8 is announced. The rc6 became technically bit smaller than rc5, but not as small as Torvalds hoped. Torvalds says we might need rc8 for this release, but nothing fixed.

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 2022-02-26 | ~/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 -rc6 releases in the last two years.