LKML News v5.19-rc8

[RESEND PATCH v3] arm64: enable THP_SWAP for arm64 (Barry Song)

https://lkml.kernel.org/r/20220718090050.2261-1-21cnbao@gmail.com

This patch enables THP_SWAP which can improve the swap performance for transparent hugepages on ARM64 architecture.

[PATCH v12 00/69] Introducing the Maple Tree (Liam Howlett)

https://lkml.kernel.org/r/20220720021727.17018-1-Liam.Howlett@oracle.com

Maple tree has already merged in the mm-unstable but a new bug has found, so the 12th version of the patchset has posted.

[PATCH v10 0/8] mm/demotion: Memory tiers and demotion (Aneesh Kumar K.V)

https://lkml.kernel.org/r/20220720025920.1373558-1-aneesh.kumar@linux.ibm.com

Tenth version of the tier-demotion improvement patchset has posted.

[PATCH v2] mm/mprotect: Fix soft-dirty check in can_change_pte_writable() (Peter Xu)

https://lkml.kernel.org/r/20220720220324.88538-1-peterx@redhat.com

This commit fixes soft-dirty checks for exclusive anonymous pages. The cover letter includes the test program for the check.

[PATCH mm-unstable 0/4] mm: fixes for userspace hugepage collapse, v7 (Zach O’Keefe)

https://lkml.kernel.org/r/20220720140603.1958773-1-zokeefe@google.com

This patchset is for cleanup of MADV_COLLAPSE patches that needs to be squashed in relevant patches in the mm tree.

Linux 5.19-rc8 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wiWwDYxNhnStS0e+p-NTFAQSHvab=2-8LwxunCVuY5-2A@mail.gmail.com

Mainly due to the retbleed mitigation, which developed under the hood and therefore not tested by the public tests and the eyeballs, eighth release candidate has released instead of the v5.19 this week. No surprise here, as usual release candidate week. If everyone do their testing as normal, next week we might see the v5.19.

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 2020-07-24 | ~/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 -rc8 releases in the last two years.