Posts

[LSF/MM/BPF TOPIC] sframe: An orc like stack unwinder for the kernel to get a user space stacktrace (Steven Rostedt) https://lkml.kernel.org/r/20230206103828.6efcb28f@rorschach.local.home Steven Rostedt proposes yet another LSF/MM/BPF topic for using sframe section, which is introduced by binutils, for more efficient user space stack tracing. [PATCH v4 00/14] Introduce Copy-On-Write to Page Table (Chih-En Lin) https://lkml.kernel.org/r/20230207035139.272707-1-shiyn.lin@gmail.com Fourth version of the patchset making copy-on-write be used for page table, while it is currently only used for the mapped memory....

[LSF/MM/BPF TOPIC] CXL Fabric Manager (FM) architecture (Viacheslav A.Dubeyko) https://lkml.kernel.org/r/7F001EAF-C512-436A-A9DD-E08730C91214@bytedance.com A topic suggestion for LSF/MM/BPF. It suggests to discuss about Fabric Manager (FM) architecture, which requires configuration tool, daemon, and QEMU emulation of CXL hardware features. [PATCH V2 0/3] sched/numa: Enhance vma scanning (Ragghavendra K T) https://lkml.kernel.org/r/cover.1675159422.git.raghavendra.kt@amd.com A patchset for improving access scanning for NUMA balancing. This uses per-thread VMA scanning idea from Mel. LSFMMBPF proposal [MM]: Lazy RCU memory reclaim (Joel Fernandes) https://lkml....

[RFC PATCH 00/19] mm: Introduce a cgroup to limit the amount of locked and pinned memory (Alistair Popple) https://lkml.kernel.org/r/cover.f52b9eb2792bccb8a9ecd6bc95055705cfe2ae03.1674538665.git-series.apopple@nvidia.com This RFC patchset introduces a cgroup limit like RLIMIT_MEMLOCKED but that for pinned pages. [RFC PATCH 0/4] Fix excessive CPU usage during compaction (Mel Gorman) https://lkml.kernel.org/r/20230125134434.18017-1-mgorman@techsingularity.net A patch for not ignoring fast_find_migrateblock() found pageblocks made compaction shows high CPU and stalls. It therefore once merged in mainline, than reverted, and again merged in mm-unstable....

[RFC] memory pressure detection in VMs using PSI mechanism for dynamically inflating/deflating VM memory (Sudarshan Rajagopalan) https://lkml.kernel.org/r/DS0PR02MB90787835F5B9CB9771A20329C4C09@DS0PR02MB9078.namprd02.prod.outlook.com Qualcomm’s Linux memory team asks upstream’s opinion about their userspace deamon approach for controlling VM memory size based on memory demands via monitoring PSI. [PATCH v1 0/3] Introduce per NUMA node memory error statistics (Jiaqi Yan) https://lkml.kernel.org/r/20230116193902.1315236-1-jiaqiyan@google.com On huge memory systems, memory error is inevitable, so detailed statistics of it helps administrators to operate systems more efficiently....

This document helps you estimating the amount of benefit that you could get from DAMON-based system optimizations, and describes how you could achieve it. Check The Signs No optimization can provide same extent of benefit to every case. Therefore you should first guess how much improvements you could get using DAMON. If some of below conditions match your situation, you could consider using DAMON. Low IPC and High Cache Miss Ratios....