[RFC] mm: introduce page pinner (Minchan Kim) https://lkml.kernel.org/r/20211206184730.858850-1-minchan@kernel.org
Page migrations commonly fails from temporal referenc count elevation. Worse yet, it’s hard to know which kernel subsystem has made the temporal reference count increase. To tracking it available, Minchan is proposing a new feature called page pinner. It tracks page put operations for pages that migration failed.
mmotm 2021-12-06-22-21 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211207062141.pMgbjXQXy%akpm@linux-foundation.org
mmotm based on v5.16-rc4 has uploaded. 14 new patches are added, 3 existign patches modified, and 1 existing patch has dropped from the queue.
mmotm 2021-11-29-18-58 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211130025839.ZhVoO1W_7%akpm@linux-foundation.org
mmotm has updated. It’s based on v5.16-rc3, adds 52 new patches, modifies 18 existing patches, and drops 2 patches. In total, 224 patches in the queue.
[QUESTION] “place pages to tail” regress memory read bandwidth about 10% under our test cases (liupeng) https://lkml.kernel.org/r/3c6349ddd9a34732a251467b7fa4fe93@huawei.com
Liu Peng found David’s patch 7fef431be9c9(mm/page_alloc: place pages to tail in __free_pages_core()) incurring performance regression, and asking some suggestions.
[RFC PATCH] mm: count zram read/write into PSI_IO_WAIT (Huangzhaoyang) https://lkml.
[PATCH 0/3] page table check (Pasha Tatashin) https://lkml.kernel.org/r/20211123214814.3756047-1-pasha.tatashin@soleen.com
Due to reference count of struct page handling issue, some memory were leak from a process and moved in another process. This commit avoids such type of bugs by checking page table at the time of entrieds insertion.
[PATCH 0/5] *** Transparent Page Placement for Tiered-Memory *** (Hasan Al Maruf) https://lkml.kernel.org/r/20211124163608.33015-1-hasanalmaruf@fb.com
This patchset augment AutoNUMA mechanism to promote pages from slow tier nodes to toptier nodes.
[PATCH -V10 0/6] NUMA balancing: optimize memory placement for memory tiering system (Huang Ying) https://lkml.kernel.org/r/20211116013522.140575-1-ying.huang@intel.com
This patchset optimizes the pages placement on tiered memory systems using DRAM and PMEM.
[RFC 0/3] page table check (Pasha Tatashin) https://lkml.kernel.org/r/20211116220038.116484-1-pasha.tatashin@soleen.com
Pasha found broken page ref issue in 4.14 kernel. The page was leaked into another process, so they were able to find the issue by examining the page tables. This patchset tries to prevent this kind of memory corruption issues by checking the page tables in time of inserting entries into user page tables.
[PATCH v4 0/3] mm: add new syscall set_mempolicy_home_node (Aneesh Kumar K.V) https://lkml.kernel.org/r/20211101050206.549050-1-aneesh.kumar@linux.ibm.com
This patchset introduces a new syscall that can be used to set a home node for the MPOL_BIND and MPOL_PREFERRED_MANY.
[RFC PATCH 0/3] Improve the migration stats (Baolin Wang) https://lkml.kernel.org/r/cover.1635936218.git.baolin.wang@linux.alibaba.com
This RFC patchset fixes the migration stats that broken here and there.
incoming (Andrew Morton) https://lkml.kernel.org/r/20211105133408.cccbb98b71a77d5e8430aba1@linux-foundation.org
The first pull request for v5.16 from Andrew Morton. Patches for DAMON subsystem including DAMOS, physical address space support, and DAMON-based proactive reclamation are also included here.
Dynamically allocated memory descriptors (Matthew Wilcox) https://lkml.kernel.org/r/YXcLqcFhDq3uUwIj@casper.infradead.org
In this mail, Matthew explains his idea on making struct page only two words and how it could work with buddy allocator freelists.
[RFC] mm: Disable NUMA_BALANCING_DEFAULT_ENABLED and TRANSPARENT_HUGEPAGE on PREEMPT_RT (Sebastian Andrzej Siewior) https://lkml.kernel.org/r/20211026165100.ahz5bkx44lrrw5pt@linutronix.de
Mel told RT patchset could incur spikes on NUMA machines when NUMA_BALANCING and THP are turned on. Sebastian request comments on disabling those on RT enabled kernel by default, but still trying to find a good test for that.
incoming (Andrew Morton) https://lkml.kernel.org/r/20211018151438.f2246e2656c041b6753a8bdd@linux-foundation.org
19 mm subsystem fix patches have sent to Linus Torvalds.
[PATCH v11 1/3] mm: rearrange madvise code to allow for reuse (Suren Baghdasaryan) https://lkml.kernel.org/r/20211019215511.3771969-1-surenb@google.com
This commit refactor some madvise code for vma updates so that those can be reused by prctl.
mmotm 2021-10-20-20-40 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211021034104.F6VxKBQcG%akpm@linux-foundation.org
Andrew updated mmotm. It’s based on 5.15-rc6, adds 74 new patches modifies 29 existing patches, and drops 22 patches. In total, 366 patches in the queue.
mmotm 2021-10-10-18-19 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211011012001.mSbkDke0y%akpm@linux-foundation.org
Update of mmotm. 33 new patches added and 7 old patches dropped. 285 patches in total.
[PATCH v2 0/2] Introduce simple pidfd to task helper (Christian Brauner) https://lkml.kernel.org/r/20211011133245.1703103-1-brauner@kernel.org
This patchset adds a simple helper to make code clean without duplications.
[PATCH v0.7 0/5] sched,mm,x86/uaccess: implement User Managed Concurrency Groups (Peter Oskolkov) https://lkml.kernel.org/r/20211012232522.714898-1-posk@google.com
This patchset implements the kernel parts for user-space m:n threading. If this is finalized and merged, user-space applications will be able to do the scheduling of their threads on their own.
[PATCH 0/2] Introduce simple pidfd to task helper (Christian Brauner) https://lkml.kernel.org/r/20211004125050.1153693-1-christian.brauner@ubuntu.com
This patchset adds a pidfd handling wrapper for removing duplications.
[PATCH 00/62] Separate struct slab from struct page (Matthew Wilcox) https://lkml.kernel.org/r/20211004134650.4031813-1-willy@infradead.org
This huge patchset separates struct slab from struct page to make struct page simple and therefore easier to handle.
[PATCH v3 00/66] Introducing the Maple Tree (Liam Howlett) https://lkml.kernel.org/r/20211005012959.1110504-1-Liam.Howlett@oracle.com
This patchset introduces Maple tree, which is intended to replace the rb tree for vmas, to improve the scalability.
[RFC PATCH 0/8] mm/madvise: support process_madvise(MADV_DONTNEED) (Nadav Amit) https://lkml.kernel.org/r/20210926161259.238054-1-namit@vmware.com
This patchset makes process_madvise() to support MADV_DONTNEED hint.
mmotm 2021-09-28-19-05 uploaded (Andrew Morton) https://lkml.kernel.org/r/20210929020604.DyNimbxao%akpm@linux-foundation.org
The mm-of-the-moment snapshot has been updated. 13 drop, 45 add, 37 modified. 184 patches in the broken/ in total.
[PATCH 1/2] memcg: flush stats only if updated (Shakeel Butt) https://lkml.kernel.org/r/20210930044711.2892660-1-shakeelb@google.com
This patchset makes memcg stats updated only when needed, as it is currently flushed on every refault and reclaim iteration.