{"rewrite":{"id":"r_5d3455823eed408b67c67ba3","clusterId":"c_27167cd40c1f62431d4fef59","slug":"linus-torvalds-used-claude-code-for-a-linux-kernel-branch","model":"deepseek-v4-1-flash","headline":"Linus Torvalds Used Claude Code For A Linux Kernel Branch","summary":"A new kernel branch owned by Linus Torvalds, named noref-filemap-read-with-llm, reworks memory management so page cache reads do not reference the folio struct, targeting folio reference count contention when many threads make small reads on one file. Torvalds said the implementation, test programs, review and the first draft of the cover letter were done with Claude Code under his direction, and the measurements ran on his machine.","whyItMatters":"The kernel's own maintainer has put an AI-written patch series on the tree under his name, at the same time the community is weighing whether the mandatory Assisted-by tag for LLM use is still needed.","webCardHtml":"\u003cp\u003eThe branch is called noref-filemap-read-with-llm, and it targets folio reference count contention, the slowdown that appears when many threads make small reads from a single file. Torvalds ran his measurements on his own machine. He also described a separate case where AI was used to make code more readable and a long-hidden bug surfaced. The work is expected to matter most in many-thread, small-read workloads, and the question now is whether it lands in the next Linux 7.4 merge window.\u003c/p\u003e","blueskyPost":"Linus Torvalds is running a Linux kernel branch called noref-filemap-read-with-llm that he says was written with Claude Code under his direction, code, tests and cover letter draft included. It targets folio reference count contention on small reads from a single file.","twitterPost":"Torvalds owns a kernel branch named noref-filemap-read-with-llm. He says the code, test programs, review and first cover letter draft came from Claude Code under his direction, with measurements on his own machine. Target: folio reference count contention.","threadsPost":null,"newsletterBlurb":"Linus Torvalds has a Linux kernel branch, noref-filemap-read-with-llm, that reworks page cache reads so they skip the folio struct, aimed at folio reference count contention when many threads read small amounts from one file. He said the implementation, tests, review and first cover letter draft were done with Claude Code under his direction. Meanwhile the kernel community is moving toward dropping the mandatory Assisted-by tag for AI and LLM use.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20261016-linus-torvalds-claude-code/\",\"title\":\"Linus Torvalds is actively using AI like Claude Code to work on improving the Linux kernel\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4712,"outputTokens":593,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1792102928,"createdAt":"2026-10-15T22:19:03.000Z","publishedAt":"2026-10-15T22:21:05.000Z","updatedAt":"2026-10-15T22:21:05.000Z"},"cluster":{"id":"c_27167cd40c1f62431d4fef59","canonicalTitle":"リーナス・トーバルズがClaude CodeなどのAIをバリバリ活用してLinuxカーネルの改善に取り組み中","representativeArticleId":"a_f63636443e19b9ac1712a1d8","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Linux\"],\"studios\":[],\"people\":[\"Linus Torvalds\"],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-15T21:00:00.000Z","lastSeenAt":"2026-10-15T21:00:00.000Z","updatedAt":"2026-10-15T22:21:05.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20261016-linus-torvalds-claude-code/","title":"リーナス・トーバルズがClaude CodeなどのAIをバリバリ活用してLinuxカーネルの改善に取り組み中"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Linux"],"studios":[],"people":["Linus Torvalds"],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}