kernel

LKML News v6.10-rc4

[PATCH 0/7] arm64 / x86-64: low-level code generation issues (Linus Torvalds) https://lore.kernel.org/20240610204821.230388-1-torvalds@linux-foundation.org Linus Torvalds posted another version of runtime const patchset for not only x86_64 but also arm64. He mentions the work was motivated by his Altra box that shows __d_lookup_rcu() like a horror. [PATCH v2 1/2] virt: pvmemcontrol: control guest physical memory properties (Yuanchu Xie) https://lore.kernel.org/20240612021207.3314369-1-yuanchu@google.com Yuanchu posted a patchset for letting guest control its physical memory properties, security features and optimizations.

LKML News v6.10-rc3

[PATCH v2 0/8] mm: workingset reporting (Yuanchu Xie) https://lore.kernel.org/20240604020549.1017540-1-yuanchu@google.com Yuanchu posted second version of the MGLRU-based workingset reporting patchset. [PATCH 0/2] mm/pstore: Reserve named unspecified memory across boots (Steven Rostedt) https://lore.kernel.org/20240603233330.801075898@goodmis.org Steven posted a patch for reserving part of memory for pstore, which is currently being reserved via firmware, via a new kernel command line parameter, reserve_mem. [PATCH v4 00/11] riscv: Memory Hot(Un)Plug support (Björn Töpel) https://lore.kernel.org/20240605114100.315918-1-bjorn@kernel.org Björn posted the fourth version of the patchset for supporting memory hot-[un]plugging and ZONE_DEVICE support on RISC-V.

LKML News v6.10-rc2

[PATCH 0/3] mm: zswap: global shrinker fix and proactive shrink (Takero Funaki) https://lore.kernel.org/20240528043404.39327-2-flintglass@gmail.com This patchset fixes two zswap issues coming from global shrinker, and add proactive shrinking of zswap which starts when zswap is 95% full, for 90% accept threshold. [PATCH v7 0/4] Memory management patches needed by Rust Binder (Alice Ryhl) https://lore.kernel.org/20240528-alice-mm-v7-0-78222c31b8f4@google.com Alice sent the seventh revision for making memory management subsystem changes that needed by Rust Binder implementation.

LKML News v6.10-rc1

[LSFMM] automating measuring memory fragmentation (Luis Chamberlain) https://lore.kernel.org/ZkUOXQvVjXP1T6Nk@bombadil.infradead.org Luis suggested yet another LSFMM session for memory fragmentation measurement aiming to be used to understand how bad the current kernel’s defragmentation approach is, and how much improvement some new proposal is making. page-flags.rst (Matthew Wilcox) https://lore.kernel.org/ZkOu4yXP-sGGtwc4@casper.infradead.org Matthew posted the page-flags documentation that he wrote with LSFMM attendees on his session. [GIT PULL] MM updates for 6.10-rc1 (Andrew Morton) https://lore.kernel.org/20240517192239.9285edd85f8ef893bb508a61@linux-foundation.org Andrew sent the memory management part pull request for 6.

LKML News v6.9

[LSF/MM/BPF TOPIC] Locally attached memory tiering (David Rientjes) https://lore.kernel.org/e90dc785-c4e6-47e4-8eda-d35325c82ff9@google.com David suggests a new LSFMM topic for local-attached memory tiering. [LSF/MM/BPF TOPIC] CXL Development Discussions (Adam Manzanares) https://lore.kernel.org/9bf86b97-319f-4f58-b658-1fe3ed0b1993@nmtadam.samsung Adam suggests a new LSFMM topic for general CXL development. kdevops BoF at LSFMM (Luis Chamberlain) https://lore.kernel.org/CAB=NE6XyLS1TaAcgzSWa=1pgezRjFoy8nuVtSWSfB8Qsdsx_xQ@mail.gmail.com Luis suggests to have a time slot for sharing ongoing developments and changes for kdevops, which automates complex kernel development workflows. [RFC PATCH 0/2] introduce budgt control in readahead (Zhaoyang Huang) https://lore.

LKML News v6.9-rc7

[PATCH] thp: Remove HPAGE_PMD_ORDER minimum assertion (Matthew Wilcox) https://lkml.kernel.org/r/20240429190114.3126789-1-willy@infradead.org Willy removes the assumption that THP order is always two or more, since we now handle order-1 folios correctly. [LSF/MM/BPF TOPIC] SLUB: what’s next? (Vlastimil Babka) https://lkml.kernel.org/r/b929d5fb-8e88-4f23-8ec7-6bdaf61f84f9@suse.cz Vlastimil proposes an LSFMM session to retrospect the SLAB deprecation, share ongoing works, and discuss possible future works for reducing similar allocators such as objpool or mempool. [LSF/MM/BPF TOPIC] Maple Tree Proposed Features (Liam R.

LKML News v6.9-rc6

[RFC PATCH 0/5] add mTHP support for anonymous share pages (Baolin Wang) https://lkml.kernel.org/r/cover.1713755580.git.baolin.wang@linux.alibaba.com Baolin adds mTHP support for anonymous shared pages with this RFC patchset. There are some todo items, though. [LSF/MM/BPF TOPIC] SLAB BOF (Matthew Wilcox) https://lkml.kernel.org/r/ZiZy2VVpTQMjN-ko@casper.infradead.org In this mail, Matthew introduces his radical idea around Slab allocator, which decouples the objects from the page and proposes a BoF to discuss it with not only Vlastimil but more audiences.

LKML News v6.9-rc5

[RFC 0/3] Improve memory statistics for virtio balloon (zhenwei pi) https://lkml.kernel.org/r/20240415084113.1203428-1-pizhenwei@bytedance.com This RFC patchset exposes six new VM statistics in the guest to the host via virtio-balloon. The statistics include oom-kill, alloc-stall, scan-async, scan-direct, reclaim-async, and reclaim-direct. [PATCH] Documentation: coding-style: don’t encourage WARN*() (Alex Elder) https://lkml.kernel.org/r/20240414170850.148122-1-elder@linaro.org Due to the panic_on_warn setting, even WARN() and its friends are not that welcomed in multiple situations. Alex posted a patchset to make this point clearer.

LKML News v6.9-rc4

[PATCH v4 0/9] transfer page to folio in KSM (Alex Shi) https://lkml.kernel.org/r/20240409092826.1733637-1-alexs@kernel.org Alex sent the first patchset for making KSM uses folios. [PATCH] tracing: Add new_exec tracepoint (Marco Elver) https://lkml.kernel.org/r/20240408090205.3714934-1-elver@google.com Marco sent a patch for adding a new tracepoint. The tracepoint is for tracing a case where new exec starts while having original state including the mm. Announcing Community Engagement Working Group (Nikolai Kondrashov) https://lkml.kernel.org/r/bf81be70-61ec-4169-b66a-5c3136869107@gmail.com/ KernelCI project announces Community Engagement Working Group which will purpose to connect with kernel maintainers and discuss test quality improvement for their subsystems.

LKML News v6.9-rc3

[PATCH v3 0/7] mm/kvm: Improve parallelism for access bit harvesting (James Houghton) https://lkml.kernel.org/r/20240401232946.1837665-1-jthoughton@google.com James posted the third version of the patchset for adding KVM’s test-and-clear-access-bits fast path that doesn’t take mmu_lock. It is RFC because the author wants to do more performance tests, and unusre if the arm64 part is correct. [PATCH] mm, mmap: remove vma_merge() (Vlastimil Babka) https://lkml.kernel.org/r/20240401192623.18575-2-vbabka@suse.cz After the successful removal of SLAB, Vlastimil suggests to remove vma_merge(). But the patch has sent on 2024-04-01 :)