lkml news

LKML News v6.5-rc5

[PATCH] MAINTAINERS: Add maple tree mailing list (Liam R. Howlett) https://lkml.kernel.org/r/20230731175542.1653200-1-Liam.Howlett@oracle.com Maple tree has its own development mailing list at infradead.org. This patch adds it on the MAINTAINERS file. Maple Tree Work 2023/08 (Laim R. Howlett) https://lkml.kernel.org/r/20230801194820.alch3ot7pvrgig5v@revolver Liam shares monthlee update of maple tree work progress and todo for avoid conflict. [RFC PATCH 0/2] vmrd: dynamic guest VM memory resizing daemon (Sudarshan Rajagopalan) https://lkml.kernel.org/r/cover.1690836010.git.quic_sudaraja@quicinc.com Sudarshan posted an RFC for dynamic guest VM memory resizing based on the guest’s memory demand.

LKML News v6.5-rc4

[PATCH v5 0/7] Add support for memmap on memory feature on ppc64 (Aneesh Kumar K.V) https://lkml.kernel.org/r/20230725100212.531277-1-aneesh.kumar@linux.ibm.com Aneesh continues adding support of memmap_on_memory for more architectures. [PATCH mm-unstable v7 00/31] Split ptdesc from struct page (Vishal Moola) https://lkml.kernel.org/r/20230725042051.36691-1-vishal.moola@gmail.com The seventh revision of the patchset for splitting page table tracking information out of struct page for making it smaller. [PATCH v3 00/49] use refcount+RCU method to implement lockless slab shrink (Qi Zheng) https://lkml.

LKML News v6.5-rc3

[PATCH v4 0/6] Add support for memmap on memory feature on ppc64 (Aneesh Kumar K.V) https://lkml.kernel.org/r/20230718024409.95742-1-aneesh.kumar@linux.ibm.com The fourth version of the patchset for support of memmap on memory on ppc64 has posted. [GIT PULL] hotfixes for 6.5-rc2 (Andrew Morton) https://lkml.kernel.org/r/20230718123131.5ec065527c2127a568e5754c@linux-foundation.org Andrew sent mm subsystem hotfixes for 6.5 rc2 to Linus. [PATCH v2 0/5] Invalidate secondary IOMMU TLB on permission upgrade (Alistair Popple) https://lkml.kernel.org/r/cover.de78568883814904b78add6317c263bf5bc20234.1689768831.git-series.apopple@nvidia.com This patch moves secondary TLB invcalidation mmu notifier callbacks to architecture specific TLB flushing functions.

LKML News v6.5-rc2

[Invitation] Linux MM Alignment Session on mshare on Wednesday (David Rientjes) https://lkml.kernel.org/r/CAE-26VAZZ+buEX0wbqHTz0k1hshYzYP3KzMmXT6jc6=NucPa0Q@mail.gmail.com David from Google is hosting yet another Linux MM Alignment session on Wednesday. The topic of this week is the process page table sharing, which could be a clear efficiency win for situations where huge number of processes sharing same pages. [PATCH v3 0/7] Add support for memmap on memory feature on ppc64 (Aneesh Kumar K.V) https://lkml.kernel.org/r/20230711044834.72809-1-aneesh.kumar@linux.ibm.com This makes the memmap on memory feature more useful for ppc64-like architectures having alignment rules that different with 64K page size.

LKML News v6.5-rc1

[GIT PULL] MM updates for 6.5-rc1 (Andrew Morton) https://lkml.kernel.org/r/20230626085035.e66992e96b4c6d37dad54bd9@linux-foundation.org Andrew Morton sent the memory management subsystem pull request for v6.5-rc1. Among the change, cachestata() syscall and Mel Gorman’s compaction optimization looks interesting to me. [GIT PULL] slab updates for 6.5 (Vlastimil Babka) https://lkml.kernel.org/r/1c39c9b0-ec37-f910-2b09-cedf7acf6e91@suse.cz Vlastimil sent the slab pull request for v6.5 to Linus Torvalds. This contains the SLAB config deprecation renaming (s/CONFIG_SLAB/CONFIG_SLAB_DEPRECATED/). [PATCH v1 0/5] mm/memory_hotplug: make offline_and_remove_memory() timeout instead of failing on fatal signals (David Hildenbrand) https://lkml.

LKML News v6.4

[PATCH] mm/memory_hotplug.c: don’t fail hot unplug quite so eagerly (John Hubbard) https://lkml.kernel.org/r/20230620011719.155379-1-jhubbard@nvidia.com Some device drivers add and remove memory to the system via memory hot [un]plog. Nevertheless, the ungplugging could fail easily, especially for the pending signal on the process. This patch simply remove the signal check error. [PATCH v2] mm/min_free_kbytes: modify min_free_kbytes calculation rules (liuq) https://lkml.kernel.org/r/20230621073912.21747-1-liuq131@chinatelecom.cn This patch adjusts min_free_kbytes calculation so that ZONE_NORMAL is unnecessarily be too small when ZONE_MOVABLE exists.

LKML News v6.4-rc7

[GIT PULL] hotfixes for 6.4-rc7 (Andrew Morton) https://lkml.kernel.org/r/20230612122712.f495e24b80f88f58557ea470@linux-foundation.org Andrew sent hot fixes pull request to Linus Torvalds. The one for DAMON is also contained. [PATCH stable 5.10 0/1] Fix memleak during hotremove memory (Ma Wupeng) https://lkml.kernel.org/r/20230614061900.3296725-1-mawupeng1@huawei.com Ma found a memory leak in memory hotplugging, and providing a patch. [ANNOUNCE/CFP] CXL Microconference at LPC 2023 (Davidlohr Bueso) https://lkml.kernel.org/r/a4c2gx2tnm4ckax7qkx2trnvmqjssfytc45sb2zikuayd2marc@rpsjp4icgsvn Davidlohr announces CXL microconference has accepted for LPC this year, and inviting people in the call for participation.

LKML News v6.4-rc6

As of 2023-06-06, for some reason https://lore.kernel.org/linux-mm seems stopped being updated since 2023-05-31. On the day of 2023-06-06, the update has resumed. [PATCH v3 0/5] riscv: Introduce KASLR (Alexandre Ghiti) https://lkml.kernel.org/r/20230606123242.20804-1-alexghiti@rivosinc.com This patchset introduces KASLR, which allows kernel mapping randomization, for riscv. Question about oom-killer (Gou Hao) https://lore.kernel.org/linux-mm/A31B3EA06AF77F13+c7278bd0-2695-4cc0-5a56-531a06ac2389@uniontech.com/ A question about oom-killer behavior that suspected to be a kernel bug. [PATCH v3] Documentation/mm: Initial page table documentation (Linus Walleij) https://lkml.kernel.org/r/20230608125501.3960093-1-linus.walleij@linaro.org

LKML News v6.4-rc5

[PATCH 00/12] mm: free retracted page table by RCU (Hugh Dickins) https://lkml.kernel.org/r/35e983f5-7ed3-b310-d949-9ae8b130cdab@google.com This patchset aims to reduce mmap_lock contention by freeing retracted page table by RCU, with preceding and succeeding patchsets. This patchset was in Google data center kernel for three years. [PATCH] mm: madvise: fix uneven accounting of psi (Charan Teja Kalla) https://lkml.kernel.org/r/1685531374-6091-1-git-send-email-quic_charante@quicinc.com For madvise(MADV_PAGEOUT) is called for folios, PSI for the folio is not always accounted. This patchset makes it be consistent by always not considering PSI for folios that are reclaimed through madvise(MADV_PAGEOUT).

LKML News v6.4-rc4

[PATCH 0/9] Mitigate a vmap lock contention (Uladzislau Rezki) https://lkml.kernel.org/r/20230522110849.2921-1-urezki@gmail.com Uladzislau sent a patchset for vmap lock contention mitigation, as suggested at LSFMM+BPF. [PATCH] mm: deduct the number of pages reclaimed by madvise from workingset (Zhaoyang Huang) https://lkml.kernel.org/r/1684919574-28368-1-git-send-email-zhaoyang.huang@unisoc.com Pages reclaimed by madvise() with MADV_PAGEOUT hint doesn’t handle the workingset, hence leads to large refault distance than it should be. This patch addresses the case by making reclaim_pages() to receive mm_struct and deduct the pages from workingset.