LKML News v5.17-rc2

[PATCH 0/7] Allocate module text and data separately (Christophe Leroy)

https://lkml.kernel.org/r/cover.1643015752.git.christophe.leroy@csgroup.eu

Powerpc book3s/32 can set execute permission in 256 MiB segments granularity instead of page granularity. This patchset therefore allow module data be allocated in vmalloc rea instead of module area.

[PATCH 0/4] mm/memcg: Address PREEMPT_RT problems instead of disabling it. (Sebastian Adrzej Siewior)

https://lkml.kernel.org/r/20220125164337.2071854-1-bigeasy@linutronix.de

This patchset enables MEMCG for PREEMPT_RT instead of disabling it.

[LSF/MM/BPF TOPIC] Folios (Matthew Wilcox)

https://lkml.kernel.org/r/YfGxPKBRdR8FKDcv@casper.infradead.org

Matthew Wilcox is proposing LSF/MM/BPF topic on Folios, for filesystem point of view and mm crowd.

mmotm 2022-01-26-21-04 uploaded (Andrew Morton)

https://lkml.kernel.org/r/20220127050456.M1eh-ltbc%akpm@linux-foundation.org

mmotm tree has updated. Compared to the previous snapshot, it’s rebased on 5.17-rc1, adds 117 new patches, modifies 20 existing patches, and drops 313 patches. In total, 164 patches in the queue.

[PATCH 00/16] Introduce memblock simulator (Karolina Drobnik)

https://lkml.kernel.org/r/cover.1643206612.git.karolinadrobnik@gmail.com

Memblock, which is a boot time memory allocator, is not easy to test and debug because it’s used in the boot time only. For testing and debugging more easily, this patchset adds memblock simulator as a tool.

LSF/MM/BPF: 2022: Call for Proposals (Josef Bacik)

https://lore.kernel.org/all/YfGnDRM%2FPe4jzbSr@localhost.localdomain/

LSF/MM/BPF, which has canceled for last 2 years, is trying again to be held this year, from 2022-05-02 to 2022-05-04 at the Palm Springs, California. The invitation request should be submitted by 2022-03-01.

[PATCH -V11 0/3] NUMA balancing: optimize memory placement for memory tiering system (Huang Ying)

https://lkml.kernel.org/r/20220128082751.593478-1-ying.huang@intel.com

This patchset optimizes memory management on DRAM/PMEM tiered memory system.

[PATCH v2 00/35] Speculative page faults (Michel Lespinasse)

https://lkml.kernel.org/r/20220128131006.67712-1-michel@lespinasse.org

Another version of speculative page faults patchset, which aims to improve the multi-core scalability of vma management. The author says this revision is simpler and more bisectable approach.

incoming (Andrew Morton)

https://lkml.kernel.org/r/20220128181341.2103de95948608a65958ae40@linux-foundation.org

12 patches for fixing mm are sent from Andrew Morton to Linus Torvalds.

[PATCH v2 0/3] mm/page_owner: Extend page_owner to show memcg information (Waiman Long)

https://lkml.kernel.org/r/20220129205315.478628-1-longman@redhat.com

Waiman found severe memory consumption due to offlined mem_cgroup structures on systems having huge number of containers. To ease the investigation, this patch extends the page_owner debugging tool to show memch information.

Linux 5.17-rc2 (Linus Torvalds)

https://lkml.kernel.org/r/CAHk-=wg4NYVVC58vBAD6Hd6MFfY4AG-aAUHtBCYQBcsKz+4XOg@mail.gmail.com

The second release candidate for v5.17 is out. The stat looks a little bit different than usual due to late NFS client merge. But, other parts look ok.

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 2019-11-23 | ~/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 -rc2 releases in the last two years.