LKML News v5.17

mmotm 2022-03-14-22-42 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20220315054352.5B187C340E8@smtp.kernel.org

The -mm tree is updated. It is rebased on 5.17-rc8, added 20 new patches, modified 10 patches, and dropped 2 patches. In total, 475 patches in the queue.

[LSF/MM TOPIC] Better handling of negative dentries (Mattew Wilcox)

https://lkml.kernel.org/r/YjDvRPuxPN0GsxLB@casper.infradead.org

There could be millions of negative dentries on a system having large memory and no memory pressure, because the number of negative dentries is constrained only by memory size. Because this could results in slow inotify, high memory usage, and poor lookup performance, Matthew is proposing to discuss about a solution in the LSF/MM of this year.

mmotm 2022-03-16-17-42 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20220317004304.95F89C340E9@smtp.kernel.org

-mm tree has updated. It’s based on 5.17-rc8, added 10 new patches, modified 3 patches, and dropped 4 patches. In toal, 481 patches in the queue.

[PATCH v2] mm: add access/dirty bit on numa page fault (Bibo Mao)

https://lkml.kernel.org/r/20220317065033.2635123-1-maobibo@loongson.cn

This patch adds dirty or access bit for platforms that doesn’t support hardware page table walks.

Linux 5.17 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wj4fFjx2pgbGNBM4wJs3=eReZ05EQyprzgT2Jv8qJ2vJg@mail.gmail.com

The extended one week for 5.17 was very calm, so the Linux v5.17 is out. This also means the merge window for v5.18 is open.

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 2020-03-21 | ~/lazybox/gnuplot/plot.py \
    --data_fmt table --type labeled-lines --xtics_rotate -90 \
    --font "Times New Roman, 5pt" --ylog --pointsize 0.3