[PATCH v2 1/2] arm64: avoid flushing icache multiple times on contiguous HugeTLB (Muchun Song) https://lkml.kernel.org/r/20220208054632.66534-1-songmuchun@bytedance.com
When a contiguous HugeTLB page is mapped, set_pte_at() is called CONT_PTES / CONT_PMDS times. Because the first flushing covers subsequent flushes, this is unnecessary overhead, so this patchset avoids it.
[PATCH v7 00/12] Multigenerational LRU Framework (Yu Zhao) https://lkml.kernel.org/r/20220208081902.3550911-1-yuzhao@google.com
Seventh version of the MGLRU patchset, which aims to reduce performance overhead and improve eviction target pages selection of reclamation logic is posted.
[PATCH] selftests: kselftest framework: Provide “finished” helper (Kees Cook) https://lkml.kernel.org/r/20220201013717.2464392-1-keescook@chromium.org
Users who want to use ksft_exit() need to figure out the internals of kselftest. This commit adds a helper function for that purpose, namely, ksft_finished().
[LSF/MM/BPF TOPIC] Handling of VMAs (Liam Howlett) https://lkml.kernel.org/r/20220201150521.owa5axfsmpdvc7uo@revolver
Liam is pointing out the VMAs are quite complicately managed with their cache, tree, linked list, and even reverse mapping. As it now shows its limit with the lock contention and complexity of the handling code, he wants to propose a simpler new way for their management.
[PATCH 0/7] Allocate module text and data separately (Christophe Leroy) https://lkml.kernel.org/r/cover.1643015752.git.christophe.leroy@csgroup.eu
Powerpc book3s/32 can set execute permission in 256 MiB segments granularity instead of page granularity. This patchset therefore allow module data be allocated in vmalloc rea instead of module area.
[PATCH 0/4] mm/memcg: Address PREEMPT_RT problems instead of disabling it. (Sebastian Adrzej Siewior) https://lkml.kernel.org/r/20220125164337.2071854-1-bigeasy@linutronix.de
This patchset enables MEMCG for PREEMPT_RT instead of disabling it.
[LSF/MM/BPF TOPIC] Folios (Matthew Wilcox) https://lkml.
[PATCH 0/3] usable memory range fixes (arm64/fdt/efi) (Frank van der Linden) https://lkml.kernel.org/r/20220110210809.3528-1-fllinden@amazon.com
This patchset fixes the usable memory range behavior when both DT and EFI are given.
[PATCHv2 0/7] Implement support for unaccepted memory (Kirill A. Shutemov) https://lkml.kernel.org/r/20220111113314.27173-1-kirill.shutemov@linux.intel.com
UEFI spec 2.9 introduces a concept of memory acceptance. It requires virtual machine platforms such as Intel TDX or AMD SEV-SNP to accept memory before use it. This patchset makes Linux kernel to support it, and therefore be able to reduce VM booting time by optimizing the acceptance.
[PATCH v4 00/32] Separate struct slab from struct page (Vlastimil Babka) https://lkml.kernel.org/r/20220104001046.12263-1-vbabka@suse.cz
The work for seperating struct slab from struct page for making the struct page simpler is updated to fourth version. As the patchset was in -next tree for a while, Vlastimil would sent a pull request of this to Linus.
[PATCH 0000/2297] [ANNOUNCE, RFC] “Fast Kernel Headers” Tree -v1: Eliminate the Linux kernel’s “Dependency Hell” (Ingo Molnar) https://lkml.kernel.org/r/YdIfz+LMewetSaEB@gmail.com
[RFC v2] mm: introduce page pin owner (Minchan Kim) https://lkml.kernel.org/r/20211228175904.3739751-1-minchan@kernel.org
Second version of the RFC for page pinning owner feature, which can be useful for tracking down who pins which page and therefore why contiguous pages allocation or migration fails.
mmotm 2021-12-29-20-07 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211230040740.SbquJAFf5%akpm@linux-foundation.org
MM of the moment has updated. It’s rebased on v5.16-rc7, adds 32 new patches to the queue, drops 11 patches from the queue, and modifies 100 existing patches.
[PATCH v5 00/16] Optimize list lru memory consumption (Muchun Song) https://lkml.kernel.org/r/20211220085649.8196-1-songmuchun@bytedance.com
Fifth version of the patchset for reducing lru memory consumption. This version fixes a sleep-in-atomic-context bug which is reported by the kernel test robot, applies some requests from Johannes, and collect Acked-by from Johannes.
[PATCH 0/2] Add a new scheme to support demotion on tiered memory system (Baolin Wang) https://lkml.kernel.org/r/cover.1640077468.git.baolin.wang@linux.alibaba.com
This patchset makes DAMOS supports demotion of memory regions.
[PATCH v4 00/17] Optimize list lru memory consumption (Muchun Song) https://lkml.kernel.org/r/20211213165342.74704-1-songmuchun@bytedance.com
Muchun found 6GB of memory was consumed by kmalloc-32 slab cache on a machine having 952 super blocks. That was due to list_lru_one allocation from memcg_nr_cache_ids. This patchset aims to fix the issue. According to a simple test, this reduces memory consumption under a situation from 24GiB to 4GiB.
mmotm 2021-12-13-21-28 uploaded (Andrew Morton) https://lkml.kernel.org/r/20211214052904.VfRYfitp0%akpm@linux-foundation.org
Andrew Morton uploaded new mmotm.
[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.