kernel

LKML News v6.9-rc2

[PATCH 0/2] support multi-size THP numa balancing (Baolin Wang) https://lkml.kernel.org/r/cover.1711453317.git.baolin.wang@linux.alibaba.com Baolin posted a patchset for making NUMA balancing algorithm for multi-sized THP (mTHP) to follow the THP strategy as the basic support. [PATCH v2 0/6] Improve visibility of writeback (Kemeng Shi) https://lkml.kernel.org/r/20240327155751.3536-1-shikemeng@huaweicloud.com Kemeng posted a patchset that adds two new debugfs file, bdi/xxx/stats and bdi/xxx/wb_stats to show whole bdi and per-wb writeback information. [PATCH v10] zswap: replace RB tree with xarray (Chris Li) https://lkml.

LKML News v6.9-rc1

[GIT PULL] slab updates for 6.9 (Vlastimil Babka) https://lkml.kernel.org/r/c021631d-29e5-432f-bfcd-1d75ec28d065@suse.cz Vlastimil sent the slab pull request for 6.9 to Linus Torvalds. [PATCH v4 0/6] Swap-out mTHP without splitting (Ryan Roberts) https://lkml.kernel.org/r/20240311150058.1122862-1-ryan.roberts@arm.com Ryan sent the fourth version of the patchset to swap-out multi-sized THP without splitting first. The approach is similar to that for PMD-sized THP. [PATCH] vmstat: Keep count of the maximum page reached by the kernel stack (Pasha Tatashin) https://lkml.kernel.org/r/20240313033417.447216-1-pasha.tatashin@soleen.com

LKML News v6.8

[RFC 01/16] mm/hmm: let users to tag specific PFNs (Leon Romanovksy) https://lkml.kernel.org/r/a77609c9c9a09214e38b04133e44eee67fe50ab0.1709631413.git.leon@kernel.org This RFC patchset introduces new flag that allows users to tag specific PFNs with extra data. [PATCH V3 01/10] mm: page_alloc: freelist migratetype hygiene (Johannes Weiner) https://lkml.kernel.org/r/20240306041526.892167-1-hannes@cmpxchg.org Whne pages of one migratetype end up on the freelists on another type, migratetype violations happen. This third version of patchset fixes it. [PATCH 0/8] tracing: Persistent traces across a reboot or crash (Steven Rostedt) https://lkml.

LKML News v6.8-rc7

[PATCH 1/1] mm/madvise: enhance lazyfreeing with mTHP in madvise_free (Lance Yang) https://lkml.kernel.org/r/20240225123215.86503-1-ioworker0@gmail.com Lance improves madvise_free_pte_range() to handle large folios that smaller than PMD-size and optimizes lazy-free of PTE-mapped smaller than PMD-size THPs using this patch. [RFC PATCH] mm: Add reclaim type to memory.reclaim (Yafang Shao) https://lkml.kernel.org/r/20240225114204.50459-1-laoar.shao@gmail.com This RFC patch extends memory.reclaim memcg file to receive type of memory to reclaim. It supports pagecache only, slabs only, and both. [LSF/MM/BPF TOPIC] mm/mempolicy extentions for heterogeneous memory systems (Gregory Price) https://lkml.

LKML News v6.8-rc6

[PATCH V2 0/2] Introduce slabinfo version 2.2 (Fangzheng Zhang) https://lkml.kernel.org/r/20240219031911.10372-1-fangzheng.zhang@unisoc.com This patchset updates slabinfo to version 2.2 and adds slabreclaim column for recording whether each slab pool is reclaim type. [RFC PATCH 0/3] make the hugetlb migration strategy consistent (Baolin Wang) https://lkml.kernel.org/r/cover.1708507022.git.baolin.wang@linux.alibaba.com Falling back to other NUMA nodes when migrating freed hugetlb is prevented while it is allowed for in-use hugetlb. This patchset make it more clear and consistent. [Invitation] Linux MM Alignment Session on Cold Page Detection on Wednesday (David Rientjes) https://lkml.

LKML News v6.8-rc5

[PATCH v3] cgroup2: New memory.max.effective like cgroup1 hierarchical_memory_limit (Jan Kratochvil) https://lkml.kernel.org/r/ZctiM5RintD_D0Lt@host1.jankratochvil.net Unlike cgroup v1, which was able to find effective memory limit using hierarchical_memorylimit and hierarchical_memsw_limit lines, cgoup v2 doesn’t have such hierarchical information, so need to read all files in the hierarchy to know the effective memory limit. This patchset adds memory.max.effective and memory.swap.max.effective to let users easily get the information. [PATCH v3 00/35] Memory allocation profiling (Suren Baghdasaryan) https://lkml.

LKML News v6.8-rc4

[PATCH] mm/cma: Add sysfs file ‘release_pages_success’ (Anshuman Khandual) https://lkml.kernel.org/r/20240206045731.472759-1-anshuman.khandual@arm.com This patch adds a new sysfs file for tracking the number of successfully released pages from a given CMA heap area. It aims to be hulpful at determining available active CMA pages. [PATCH v2] mm/demotion: print demotion targets (Li Zhijian) https://lkml.kernel.org/r/20240206020151.605516-1-lizhijian@fujitsu.com Li Zhijian sent a patch for printing demotion target information in case of fallback for unmet requirements on the target node, directly to the kernel log.

LKML News v6.8-rc3

[GIT PULL] hotfixes for 6.8-rc3 (Andrew Morton) https://lkml.kernel.org/r/20240128232759.7535e6774bec152556fb9730@linux-foundation.org Andrew Morton sent a hotfixes pull request to Linus Torvalds. [LSF/MM/BPF TOPIC] Reclaiming & documenting page flags (Matthew Wilcox) https://lkml.kernel.org/r/Zbcn-P4QKgBhyxdO@casper.infradead.org Matthew proposes yet another LSFMM topic for discussing what page flags actually mean altogether, for better documentation. [PATCH v7 0/1] mm: report per-page metadata information (Sourav Panda) https://lkml.kernel.org/r/20240129224204.1812062-1-souravpanda@google.com Sourav from Google posted a patch for adding a new field on /proc/meminfo and /sys/devices/system/node/nodeN/vmstat called PageMetadata and nr_page_metadata respectively, which can helps understand how much memory are being used for page metadata.

LKML News v6.8-rc2

Project: Improving the PCP allocator (Matthew Wilcox) https://lkml.kernel.org/r/Za6RXtSE_TSdrRm_@casper.infradead.org Matthew introduces an idea to improve the PCP allocator, roughly saying, keeping only compound memory on the PCP list. [PATCH v2 0/3] Enable >0 order folio memory compaction (Zi Yan) https://lkml.kernel.org/r/20240123034636.1095672-1-zi.yan@sent.com Zi enables larger than zero order folio compaction, which is the prerequisite for large folio support. [PATCH v2 1/3] mm: make vm_area_struct anon_name field RCU-safe (Suren Baghdasaryan) https://lkml.kernel.org/r/20240123231014.3801041-1-surenb@google.com For lockless /proc/pid/maps reads, this patch makes anon_name field of vm_area_struct, which is the only one field that need to be accessed for reading the file but not RCU-protected, to be protected by RCU.

LKML News v6.8-rc1

[GIT PULL] MM updates for 6.8-rc1 (Andrew Morton) https://lkml.kernel.org/r/20240108155039.fd2798712a2a93a108b710ce@linux-foundation.org/ Andrew Morton sent the memory management subsystem side pull request for Linux v6.8-rc1 to Linus Torvalds. The request has many interesting changes including zswap writeback improvement, Feedback-based DAMOS autotuning, Multi-size anon THP, KSM advisor and many more. [GIT PULL] non-MM updates for 6.8-rc1 (Andrew Morton) https://lkml.kernel.org/r/20240109110420.dcdefe80d76257d9ff645a32@linux-foundation.org Andrew sent yet another pull request for out of memory management subsystem changes to Linus Torvalds.