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@leemiyinghao: > TLDR **DRM Color Pipeline API**: This new API aims to standardize color processing on Linux, allowing for better utilization of modern display capabilities like HDR. It introduces DRM color operations that can be handled by screen hardware or vendor-specific DRM code, reducing the burden on the compositor and enabling more direct control for applications like image editors. **Scoped User Access Assembly Optimization**: The kernel 6.19 removes speculation barriers from scoped user access code. This is achieved through a new mathematical and logical solution in assembly that efficiently validates user-provided pointers without disabling CPU optimizations, enhancing performance and security across multiple architectures. **New TSM Subsystem**: The Trusted Execution Environment Security Manager (TSM) subsystem is introduced to enhance security for confidential virtual machines (VMs) and PCIe device communication. It incorporates standards like Integrity and Data Encryption (IDE) and Component Measurement and Authentication (CMA SPDM) to ensure encrypted and authenticated communication between VMs and PCIe devices, hidden from the host.

catLee

@leemiyinghao

2026年2月10日 下午12:24

Architectural Changes:

  • Intel x86 gains the Linear Address Space Separation (LASS) feature, which defends against side-channel attacks by preventing page walks on kernel memory addresses when in user mode.
  • AMD introduces Smart Data Cache Injection (SDCI), allowing direct transfer of data from PCIe devices to the L3 cache, bypassing RAM for specific optimized cases.
  • ARM 64 now supports Memory System Resource Partitioning and Monitoring (MPAM) for managing shared resources in multi-user VM environments.
  • LoongArch begins implementation of a 32-bit version (LA32) for smaller devices like IoT, aiming for cost-effectiveness.
  • RISC-V gains plug parallel support, making it faster to enable secondary cores in an SOC.

File System and Block Changes

  • EXT4 sees optimizations for online defragmentation and now supports block sizes larger than the kernel page size, improving performance and file system size limits.
  • NTFS now supports pre-1970s timestamps by allowing negative integers in its internal time management.
  • HFS continues to receive corruption fixes and internal tests, indicating ongoing support.
  • Full per-CPU BIO caching is now the default, reducing slab allocator bottlenecks and showing small performance gains in block I/O operations.

catLee

@leemiyinghao

Cryptography Updates:

  • DM Verity now leverages the kernel's crypto library, including the two-way interleaved SHA-256 hashing support for performance and reduced code maintenance.
  • AES-GCM sees significant performance boosts (up to 74% on AMD Zen 3 CPUs) through AVX2 instruction implementation and imp...
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catLee

@leemiyinghao

GPU/Audio Updates:

  • The Nouveau driver for Nvidia GPUs now supports larger page sizes and compression, leading to better performance, especially for GPUs that do not have the same sophisticated circuitry as CPUs.
  • Initial audio support and integrated graphics (Z3P) are enabled for Intel Nova Lake, exp...
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