news

LKML News v5.18-rc7

[PATCH v3 0/6] mm: introduce shrinker debugfs interface (Roman Gushchin) https://lkml.kernel.org/r/20220509183820.573666-1-roman.gushchin@linux.dev This patchset introduces a descent debugfs interface for debugging the shrinker mechanism. [PATCH v3 0/3] Fix CONT-PTE/PMD size hugetlb issue when unmapping or migrating (Baolin Wang) https://lkml.kernel.org/r/cover.1652147571.git.baolin.wang@linux.alibaba.com For PTE-cont or PMD-cont size hugetlb pages, migration or unmapping of poisoned hugetlb pages which are using ptep_clear_flush() and set_pte_at() can cause data consistency issue. This patchset tries to fix the issue.

LKML News v5.18-rc6

Memory allocation on speculative fastpaths (Paul E. McKenney) https://lkml.kernel.org/r/20220503155913.GA1187610@paulmck-ThinkPad-P17-Gen-1 There was a discussion about allocating memory inside RCU read critical section with GFP_KERNEL during LSFMM. Paul is summing up his points about it in this mail. [PATCH] mm,doc: Add new documentation structure (Matthew Wilcox) https://lkml.kernel.org/r/20220503063032.3680308-1-willy@infradead.org There was a session for MM documentation in the LSFMM. Matthew is restructuring the Documentation files to be more similar to Mel Gorman’s “Understanding the Linux Virtual Memory Manager”.

LKML News v5.18-rc5

[PATCH v5 0/4] memcg: introduce per-memcg proactive reclaim (Yosry Ahmed) https://lkml.kernel.org/r/20220425190040.2475377-1-yosryahmed@google.com The fifth version of the patchset for adding per-memch proactive reclamation trigger interface. mmotm 2022-04-25-17-59 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220426005932.848CBC385A4@smtp.kernel.org The mmotm has updated. It has rebased on 5.18-rc4, added 62 new patches, modified 8 patches, and dropped 19 patches. In total, 334 patches in the queue. [PATCH -V2 0/3] memory tiering: hot page selection (Huang Ying) https://lkml.kernel.org/r/20220426085105.60822-1-ying.huang@intel.com This patchset adds hot pages selection to the tiered memory promotion mechanism for better performance.

LKML News v5.18-rc4

LSF/MM/BPF 2022: Running BOF (Matthew Wilcox) https://lkml.kernel.org/r/Yl7TUDtLcrhXcp1g@casper.infradead.org Matthew is proposing a running BOF, which would do discussions while running after a breakfast. mmotm 2022-04-20-17-12 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220421001235.5F4E0C385A0@smtp.kernel.org -mm tree has updated. It’s rebased on 5.18-rc3, added 69 patches modified 126 patches, and dropped 35 patches. In total, 291 patches in the queue. [PATCH v2] mm: make minimum slab alignment a runtime property (Peter Collingbourne) https://lkml.kernel.org/r/20220421211549.3884453-1-pcc@google.com This makes slab alignment a runtime property and only align to 16 if KASAN is enabled at runtime.

LKML News v5.18-rc3

Re: [PATCH v10 00/14] Multi-Gen LRU Framework (Andrew Morton) https://lore.kernel.org/linux-mm/20220411191559.a844c7140faeba2e68d842b7@linux-foundation.org/ Andrew Morton’s overall answer to MGLRU patchset. He would merge the latest MGLRU in -mm and -next, but would request broader update to the code. mmotm 2022-04-12-21-05 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220413040610.06AAAC385A4@smtp.kernel.org A snapshot of -mm has updated. It added 79 new patches, modified 24 patches, and dropped 10 patches. In total, 257 patches in the queue. [PATCH v2 0/5] mm: demotion: Introduce new node state N_DEMOTION_TARGETS (Jagdish Gediya) https://lkml.

LKML News v5.18-rc2

[PATCH v7 00/70] Introducing the Maple Tree (Liam Howlett) https://lkml.kernel.org/r/20220404143501.2016403-1-Liam.Howlett@oracle.com The seventh version of the Maple tree patchset has posted. Liam is explicitly asking Andrew to merge it in -mm. LSF/MM/BPF: 2022: Call for Proposals VIRTUAL OPTION (Josef Bacik) https://lore.kernel.org/linux-mm/YksmQSfuIx%2FOiNA8@localhost.localdomain/ CFP for virtual attendee of LSF/MM/BPF has posted. The virtual instance of LSF/MM/BPF will be hosted on Zoom. mmotm 2022-04-04-17-10 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220405001100.410E3C2BBE4@smtp.kernel.org The mmotm snapshot has updated. It’s rebased on v5.

LKML News v5.18-rc1

[LSF/MM TOPIC] Improving OOM debugging (Ken Overstreet) https://lkml.kernel.org/r/20220322005101.actefn6nttzeo2qr@moria.home.lan Ken proposes an LSF/MM slot for discussing OOM debugging situation improvement with two ideas from his side. incoming (Andrew Morton) https://lkml.kernel.org/r/20220322143803.04a5e59a07e48284f196a2f9@linux-foundation.org Andrew Morton has sent 227 patches to Linus Torvalds, as the first batch of the pull requests for v5.18. It includes DAMON patches including pid hiding and its sysfs interface, and merged. [PATCH 0/2] mm: madvise: return exact bytes advised with process_madvise under error (Charan Teja Kalla) https://lkml.

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.

LKML News v5.17-rc8

mmotm 2022-03-06-20-33 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220307043435.251DBC340E9@smtp.kernel.org The -mm tree has updated. It’s based on v5.17-rc6, added 19 patches, modified 6 patches, and dropped 19 patches. In totla, 428 patches in the queue. [PATCH v3] mm: add ztree - new allocator for use via zpool API (Ananda) https://lkml.kernel.org/r/20220307142724.14519-1-a.badmaev@clicknet.pro Third version of ztree, which is intended to be used for storing compressed objects per ztree block. Comparing to the previous version, compiler warnings have fixed.

LKML News v5.17-rc7

[PATCH/RESEND] mm: add ztree - new allocator for use via zpool API (Ananda) https://lkml.kernel.org/r/20220228110546.151513-1-a.badmaev@clicknet.pro Ztree is another zpool backend that superior with regard to the worst execution time. mmotm 2022-02-28-14-45 uploaded (Andrew Morton) https://lkml.kernel.org/r/20220228224600.44415C340EE@smtp.kernel.org mmotm has updated. It’s rebased on 5.17-rc6, added 56 new patches, modified 85 patches, and dropped 55 patches. In total, 378 patches are in the queue. [PATCH -V14 0/3] NUMA balancing: optimize memory placement for memory tiering system (Huang Ying) https://lkml.