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Linus Torvalds is working on a Linux kernel patch series intended to reduce contention when many threads make small reads from the same file. The reported approach reads from the page cache without taking folio references. It is work on a branch—not evidence of a merged or released Linux feature—and the available report does not provide exact benchmark results.
What is Torvalds changing?
The reported branch is named noref-filemap-read-with-llm. Its goal is to let a file-read path access data in the page cache without folio references. In the workload described by Phoronix, many threads read small amounts from one file and contend while updating folio reference counts. Avoiding those references is intended to reduce that contention in this specific situation; it is not a claim that Linux will become faster for every workload.
A folio is a unit of memory managed by the Linux kernel. Reference counting tracks whether code still needs an object and helps the kernel manage its lifetime. When many threads repeatedly touch the same shared data, the bookkeeping itself can become a point of contention. The proposal targets that overhead in the described read path.
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What role did Claude Code play?
Phoronix reports that Torvalds used Claude Code under his direction while working on the series. The patch message, as quoted by Phoronix, says: “The code, the test programs, the review behind the list above and the first draft of this text were done with an LLM coding assistant (Claude Code) under my direction. The measurements were run on my machine.”
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That disclosure describes assistance with code, tests, review, and an initial draft; it does not say the assistant independently designed or validated the change. Torvalds’ message attributes the measurements to his machine, but the accessible report does not identify the machine or provide enough benchmarking methodology to assess the results independently.
How much faster is the proposed change?
Phoronix describes the performance impact as significant and includes a results chart, but its accessible article text does not state the numerical results or the test conditions. No specific speedup can therefore be reported responsibly from that text. The reported claim is limited to the tested scenario; it should not be treated as a general performance improvement until the underlying results and methodology can be evaluated.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Has the change shipped in Linux?
No. The report describes patches on Torvalds’ branch, not a merged change or a feature in a released kernel. Phoronix said at publication that inclusion in the upcoming Linux 7.4 merge window was uncertain. The subsequent merge and release status is not established by the available reporting.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThe report was published by Michael Larabel at Phoronix on October 11, 2026. Its links to the patch message and branch could not be accessed for independent verification in the reporting available here. Readers should distinguish the reported in-progress work from any later kernel release notes or merge confirmation.
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