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Harness pitches AI agents as your new DevOps taskmasters

4 weeks 1 day ago
Productivity gains promised, but humans still expected to audit the bots

At its Unscripted event in London, DevOps company Harness presented its latest AI-driven modules, including an AI pipeline builder, AI test automation, autonomous code fixing when builds fail, AI AppSec (application security) and even AI-driven chaos testing, where resiliency is tested by introducing random failures.…

Tim Anderson

Stablecoin Issuer Circle Examines 'Reversible' Transactions in Departure For Crypto

4 weeks 1 day ago
Circle, the world's second-biggest issuer of stablecoins, is examining ways to make it possible to reverse transactions involving its tokens [non-paywalled source], in a rare admission by a major crypto firm that it needs to take lessons from the traditional financial sector. Financial Times: Circle president Heath Tarbert said a mechanism that allowed money to be refunded in cases of fraud or disputes would help the stablecoin industry's push to become part of the financial mainstream. "We are thinking through...whether or not there's the possibility of reversibility of transactions, right, but at the same time, we want settlement finality," Tarbert told the Financial Times. "So there's an inherent tension there between being able to transfer something immediately, but having it be irrevocable," he added. Such measures could be seen as a major departure from the crypto industry's previous emphasis on the "immutability" of the blockchain, a digital ledger that is public and records transactions that cannot be unwound.

Read more of this story at Slashdot.

msmash

Kernel 6.15.4 Performance Tuned, Networking Polished, Stability Reinforced

4 weeks 1 day ago
by George Whittaker Introduction

In the life cycle of any kernel branch, patch releases, those minor “.x” updates, play a vital role in refining performance, patching regressions, and ironing out rough edges. Kernel 6.15.4 is one such release: it doesn’t bring headline features, but focuses squarely on stabilizing and optimizing the 6.15 series with targeted fixes in performance and networking.

While version 6.15 already introduced several ambitious changes (filesystem improvements, networking enhancements, Rust driver infrastructure, etc.), the 6.15.4 update doubles down on making those changes more robust and efficient. In this article, we'll walk through the most significant improvements, what they mean for systems running 6.15.*, and how to approach updating.

Release Highlights

The official announcement of Kernel 6.15.4 surfaced around late June 2025. The release includes:

  • A full source tarball (linux-6.15.4.tar.xz) and patches.

  • Signature verification via PGP for integrity.

  • A changelog/diff summary comparing 6.15.3 → 6.15.4.

This update is not a major feature expansion; it’s a refinement release targeting performance regressions, network subsystem reliability, and bug fixes that emerged in prior 6.15.* builds.

Performance Enhancements

Because 6.15 already brought several ambitious changes to memory, I/O, scheduler, and mount semantics, many of the improvements in 6.15.4 are about smoothing interactions, avoiding regressions, and reclaiming performance in corner cases. While not all patches are publicly detailed in summaries, we can infer patterns based on what 6.15 introduced and what “performance patches” generally target.

Memory & TLB Optimizations

One often-painful cost in high-performance workloads is flushing translation lookaside buffers (TLBs) too aggressively. Kernel 6.15 had already begun to optimize broadcast TLB invalidation using AMD’s INVLPGB (for remote CPUs) to reduce overhead in multi-CPU environments. In 6.15.4, fixes likely target edge cases or regressions in those mechanisms, ensuring TLB invalidation is more efficient and consistent.

Additionally, various memory management cleanups, object reuse, and page handling improvements tend to appear in patch releases. While not explicitly documented in the public summaries, such fixes help reduce fragmentation, locking contention, and latency in memory allocation.

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George Whittaker