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description/open_source: update phoronix vs LWN to date 20250715
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Cheng Jian
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@@ -1472,7 +1472,7 @@ AMD-pstate 驱动程序利用 ITMT 体系结构提供的功能和数据结构,
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| 2025/01/31 | Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> | [Improve gpu_scheduler trace events + uAPI](https://lore.kernel.org/all/20250131110328.706695-1-pierre-eric.pelloux-prayer@amd.com) | TODO | v7 ☐☑✓ | [LORE v7,0/7](https://lore.kernel.org/all/20250131110328.706695-1-pierre-eric.pelloux-prayer@amd.com)<br>*-*-*-*-*-*-*-* <br>[LORE v8,00/10](https://lore.kernel.org/all/20250320095818.40622-1-pierre-eric.pelloux-prayer@amd.com)<br>*-*-*-*-*-*-*-* <br>[LORE v9, 00/10](https://lore.kernel.org/all/20250424083834.15518-1-pierre-eric.pelloux-prayer@amd.com)<br>*-*-*-*-*-*-*-* <br>[LORE v11, 00/10](https://lore.kernel.org/all/20250526125505.2360-1-pierre-eric.pelloux-prayer@amd.com) |
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| 2024/11/28 | Raag Jadav <raag.jadav@intel.com> | [Introduce DRM device wedged event](https://lore.kernel.org/all/20241128153707.1294347-1-raag.jadav@intel.com) | [phoronix, 2025/02/20, Linux Finally Introducing A Standardized Way Of Informing User-Space Over Hung GPUs](https://www.phoronix.com/news/Linux-6.14-Wedged-GPUs-User), [phoronix, 2025/03/01, Linux's New Way Of Informing User-Space Over Hung GPUs May Become More Useful](https://www.phoronix.com/news/Extending-Linux-GPU-Wedge-Event). | v10 ☐☑✓ | [LORE v10,0/4](https://lore.kernel.org/all/20241128153707.1294347-1-raag.jadav@intel.com) |
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| 2025/03/07 | Matthew Auld | [drm/xe/uapi: Use hint for guc to set GT frequency](https://lists.freedesktop.org/archives/intel-xe/2025-January/066028.html) | [phoronix, 2025/03/07, Intel Xe Driver Introducing SVM, EU Stall Sampling & Other New Features For Linux 6.15](https://www.phoronix.com/news/Intel-Xe-SVM-For-Linux-6.15). | v5 ☐☑✓ | [LORE v5](https://lists.freedesktop.org/archives/intel-xe/2025-January/066028.html) |
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| 2026/01/04 | HongleiHuang-amd | [New AMD Linux Driver Patches Posted For Batch Userptr Allocation Support](https://www.phoronix.com/news/AMDKFD-Batch-Userptr-Allocation) | AMDKFD 内核计算驱动最近正在开发的一项新功能是支持批处理用户指针"userptr"分配. 有了这个新的用户空间 API, 将可以支持分配多个非连续的 CPU 虚拟地址范围, 这些地址映射到一个连续的 GPU 虚拟地址. 参加 [](https://www.phoronix.com/news/AMDKFD-Batch-Userptr-Allocation) | NA | [libhsakmt: Add batch userptr range registration API](https://github.com/ROCm/rocm-systems/commit/ac21716e5d6f68ec524e50eeef10d1d6ad7eae86) |
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<br>
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@@ -638,6 +638,13 @@ Wasmtime 完全开源, 使用 Rust 编程语言, 是的, 并且符合 WASI 标
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[phoronix, 2025/03/26, Microsoft Announces Open-Source "Hyperlight Wasm" Project](https://www.phoronix.com/news/Microsoft-Hyperlight-Wasm)
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## 9.2 Wasm-Linux
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[LKML, 2025/11/01, Port of Linux to WebAssembly](https://lwn.net/ml/all/618f3602-03aa-46a8-b2d4-3c9798c4cd2b@icemanor.se), [linux-wasm](https://joelseverin.github.io/linux-wasm)
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[phoronix, 2025/12/01, Linux Kernel Ported To WebAssembly - Demo Lets You Run It In Your Web Browser](https://www.phoronix.com/news/Linux-Kernel-WebAssembly), [Linux/Wasm Page](https://joelseverin.github.io/linux-wasm), [Github, joelseverin/linux-wasm](https://github.com/joelseverin/linux-wasm/tree/master/patches)
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# 10 云原生
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@@ -1360,6 +1360,14 @@ Fedora 尝试优化 systemd 开机以及重启的时间, 参见 phoronix 报道
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| 2025/03/13 | Rahul Rameshbabu <sergeantsagara@protonmail.com> | [Initial work for Rust abstraction for HID device driver development](https://lore.kernel.org/all/20250313160220.6410-2-sergeantsagara@protonmail.com) | [phoronix, 2025/03/16, Linux Kernel's Rust Support Being Expanded To HID Drivers](https://www.phoronix.com/news/Linux-Rust-HID-Drivers-Patches) | v1 ☐☑✓ | [LORE v1,0/3](https://lore.kernel.org/all/20250313160220.6410-2-sergeantsagara@protonmail.com)|
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| 2025/09/21 | [rust_binder: add Rust Binder driver](https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git/commit/?h=char-misc-next&id=eafedbc7c050c44744fbdf80bdf3315e860b7513) | [phoronix, 2023/12/02, Google Rewriting Android's Binder In Rust With Promising Results](https://www.phoronix.com/news/Google-Linux-Binder-In-Rust), [phoronix, 2025/09/21, Linux 6.18 Expected To Land Google's Rust Binder Driver](https://www.phoronix.com/news/Rust-Binder-For-Linux-6.18) |
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### 21.1.2 Rex
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弗吉尼亚理工大学和伊利诺伊大学厄巴纳-香槟分校的研究人员在 2025 年 12 月于东京举办的 Linux Plumbers Conference 2025 上介绍了 Rex [LPC-2025, Rex and its integration with Rust-for-Linux](https://lpc.events/event/19/contributions/2190/). Rex 旨在为"安全且可用"的基于 Rust 的内核扩展而设计, 这些扩展可以替代 eBPF 程序, 用于扩展 Linux 内核功能. 参见 [phoronix, 2025/12/22, Rex: Proposed Safe Rust Kernel Extensions For The Linux Kernel, In Place Of eBPF](https://www.phoronix.com/news/Linux-Kernel-Rust-Rex), 代码可以参见 [github, RES](https://github.com/rex-rs/rex).
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## 22.2 C++
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@@ -124,7 +124,8 @@
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| 2022 | [为了忘却的纪念——2022 Linux 内核十大技术革新功能](https://blog.csdn.net/csdnnews/article/details/128731761) |
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| 2023 | [熠熠生辉 | 2023 年 Linux 内核十大技术革新功能](https://blog.csdn.net/csdnnews/article/details/135493424) |
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| 2024 | [2024年Linux内核十大技术革新盘点｜年终盘点](https://blog.csdn.net/csdnnews/article/details/145127830)<br>*-*-*-*-*-*-*-* <br>[phoronix, 2025/01/01, The Most Popular Linux & Open-Source News Of 2024](https://www.phoronix.com/news/Linux-Open-Source-News-2024)
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| 2024 | [2024年Linux内核十大技术革新盘点｜年终盘点](https://blog.csdn.net/csdnnews/article/details/145127830)<br>*-*-*-*-*-*-*-* <br>[phoronix, 2025/01/01, The Most Popular Linux & Open-Source News Of 2024](https://www.phoronix.com/news/Linux-Open-Source-News-2024) |
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| 2025 | [phoronix, 2025/12/27, Linux Kernel Highlights For 2025: Schedulers, Rust & Torvalds' Commentary](https://www.phoronix.com/news/Linux-Kernel-Highlights-2025) |
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# 6 业界会议
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| 2025/09/18 | Marco Elver <elver@google.com> | [Compiler-Based Capability- and Locking-Analysis](https://lore.kernel.org/all/20250918140451.1289454-1-elver@google.com) | 一项基于编译器的"能力分析" (Capability Analysis) 与"锁分析" (Locking Analysis) 功能, 旨在通过 Clang 的静态分析能力, 在编译期检测 Linux 内核中同步机制(如锁、RCU、信号量等) 使用的合规性. 关键点包括: <br>采用 Clang 的 Capability System 特性, 扩展 C 语言以支持能力注解, 确保锁等资源的获取与释放符合预期. <br>分析机制独立于运行时工具(如 Lockdep、KCSAN), 无性能开销, 提前发现潜在并发问题.<br>支持多种同步原语, 包括 spinlock、mutex、rwlock、seqlock、RCU 等.<br>目标是提升内核并发安全性, 同时降低静态分析误报与维护成本. | v3 ☐☑✓ | [2025/09/18, LORE v3, 0/35](https://lore.kernel.org/all/20250918140451.1289454-1-elver@google.com) |
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使用 `schbench` 工具进行测试, 每秒请求数(RPS)从 5.4M 下降到 3.4M, 问题表现为 `newidle balance` 操作次数增加了约 100 倍, 这些操作大多失败, 未能找到负载可迁移的 CPU. 工作线程约 20% 的时间花在 `newidle balance` 上. 因此本补丁尝试在 newidle balance 失败时增大其成本(`domain_cost`), 从而抑制其频繁触发. 同时对成本的上限进行限制, 防止其无限增长. sched_balance_newidle()` 函数中, 原逻辑: 无论 newidle balance 是否成功，均使用实际耗时更新 `max_newidle_lb_cost`. 新逻辑: 如果没有拉取到任务(`pulled_task == false`), 则将该次 balance 的 cost 提升为当前最大 cost 的 1.5 倍. 这样做的目的是: 提升失败操作的成本感知, 使得调度器在未来更谨慎地触发 newidle balance. `update_newidle_cost()` 函数中, 原逻辑: 直接更新 `sd->max_newidle_lb_cost = cost;`, 新逻辑: 增加上限限制, 使用 `sysctl_sched_migration_cost + 200` 作为最大值. 避免成本无限增长
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| 2025/12/04 | Srikar Dronamraju <srikar@linux.ibm.com> | [Steal time based dynamic CPU resource management](https://lore.kernel.org/all/20251204175405.1511340-1-srikar@linux.ibm.com) | 邮件提出了一种基于 steal time( 虚拟化中被其他虚拟机占用的时间) 的动态 CPU 资源管理机制, 旨在优化 PowerVM Shared LPARs 环境下的调度效率. 通过监控 steal time 来判断系统是否过载或欠载, 并据此动态调整 CPU 容量和可用性, 引导调度器减少资源争用,提升整体性能. <br><br>实验数据显示, 在非竞争( nonoise) 和竞争( noise) 场景下, 使用该补丁集后使用的 CPU 核心数减少, 同时缓存缺失、上下文切换、指令执行等指标平均降低约 3 倍, 性能有所提升. 尽管在某些线程数下存在性能回归, 但整体资源利用更高效. <br><br>补丁集共 17 个, 涉及调度器、PowerPC 架构及 pseries 平台的多处修改, 支持软下线/上线 CPU、动态调整拓扑和容量、调试接口等功能. 作者欢迎社区反馈, 并指出未来可扩展支持其他架构或其他提示机制. | v1 ☐☑✓ | [2025/12/04, LORE v1, 0/17](https://lore.kernel.org/all/20251204175405.1511340-1-srikar@linux.ibm.com) |
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