LKML News v6.0-rc3

[mm] 96db82a66d: will-it-scale.per_process_ops -95.3% regression (kernel test robot)

https://lkml.kernel.org/r/YwIoiIYo4qsYBcgd@xsang-OptiPlex-9020

A big regression of mm multi-cpu scalability test (will-it-scale) has found by the kernel test robot. The commit 96db82a66d1db0e2966c02dc492e02eeb3a94a75 (“mm: align larger anonymous mappings on THP bundaries”) is pointed out as the suspect.

[PATCH v13 00/70] Introducing the Maple Tree (Liam Howlett)

https://lkml.kernel.org/r/20220822150128.1562046-1-Liam.Howlett@oracle.com

The thirteenth version of the maple tree patchset has posted after rebased on latest mm-unstable and fixed some bugs. It has merged in the mm-unstable soon.

[GIT PULL] hotfixes for 6.0-rc3 (Andrew Morton)

https://lkml.kernel.org/r/20220822170721.1e32635aaedb6f4c53933390@linux-foundation.org

Andrew posted some hotfixes for v6.0-rc3.

[PATCH v3] page_ext: introduce boot parameter ‘early_page_ext’ (Li Zhe)

https://lkml.kernel.org/r/20220825063102.92307-1-lizhe.67@bytedance.com

This patch introduces a new boot parameter called early_page_ext to allow calling page_ext_init() before page_alloc_init_late().

[RFC PATCH 1/2] mm/demotion: Expose memory type details via sysfs (Aneesh Kumar K.V)

https://lkml.kernel.org/r/20220825092325.381517-1-aneesh.kumar@linux.ibm.com

This patch exposes memory type detail information for tiers via sysfs.

[RFC 0/2] Introduce cgroup.top interface (Lu Jialin)

https://lkml.kernel.org/r/20220826011503.103894-1-lujialin4@huawei.com

This RFC patchset adds cgroup.top file under cgroupfs, which can be used to gather top-down resource usage information.

[PATCH] mm: kill is_memblock_offlined() (Kefeng Wang)

https://lkml.kernel.org/r/20220827112043.187028-1-wangkefeng.wang@huawei.com

This patch removes one line wrapper function, is_memblock_offlined() and make the callers do the check on its own.

Linux 6.0-rc3 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=whaiqzB6a_daUpvGyDg-cvkXKwwfjwPKV4HQRcci+8BeA@mail.gmail.com

Linus releases the third release candidate for v6.0 of the Linux kernel. There are some known issues but nothing scary and almost normal. He also notices it was the week was having the 31st anniversary of Linux.

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 2020-08-29 | ~/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.