Linux 7.4 pulled in 19,671 commits during its two-week merge window. That is the largest merge window on record, according to Phoronix’s analysis of kernel merge windows. Linus Torvalds closed the window on Sunday, November 1, 2026, with the release of Linux 7.4-rc1.
The size alone is not the main story. Torvalds says a large share of the work is AI-driven, and it now lands at a better point in the cycle. Instead of flooding the late testing weeks, fixes found by AI tools are arriving during the merge window.
What Torvalds said about the AI flood
In his Linux 7.4-rc1 announcement on the kernel mailing list, Torvalds called the merge window unusually large. He counted almost 20,000 commits, against a more common figure of about 15,000. The shortlog alone runs to roughly 24,000 lines, or 1.2MB.
He linked much of the growth to AI. Many changes fix problems that AI tools found. Many patches were also suggested by AI, although, in his words, “they often get rewritten.”
Torvalds was clear about which timing he prefers. He wrote that he is “much happier with the flood of AI triggered work going into the merge window.” He added: “I think that’s a much healthier model.”
Not all of the bulk is AI
Torvalds also flagged a large chunk of noise. About a third of the patch consists of AMD GPU register offsets and bit masks. He told readers to ignore those header files when judging the release.
Roughly half of the changes are drivers. That share rises to about two thirds once the AMD headers are excluded. The rest covers architecture code, filesystems, tooling such as perf and selftests, and core areas like networking, Rust, BPF and memory management.
How Linux 7.4 compares with earlier merge windows
Phoronix tracked merge window sizes back to Linux 3.1 in 2011. Most merge windows used to land around 13,000 to 14,000 commits or fewer. The jump over the last few releases is steep.
| Kernel version | Merge window commits |
|---|---|
| Linux 3.1 (2011) | 7,620 |
| Linux 7.2 | 14,395 |
| Linux 7.3 | 16,267 |
| Linux 7.4 | 19,671 |
The record covers the total number of merge window commits. It is not a count of AI-written patches. Torvalds did not give a figure for the share of AI-found or AI-suggested changes.
Growth also reaches beyond the merge window. Phoronix notes that Linux 7.3 was the first cycle to pass 20,000 commits in total, with 20,260 from v7.2 to v7.3. The outlet wrote that “a lot of the uptick in kernel patches is due to AI/LLMs.”
Why the timing matters
A kernel cycle has two phases. The merge window accepts new features and large changes. The release candidate weeks that follow are meant for testing and fixing what broke.
Late fixes make that second phase harder. Each one needs review, and each one can cause new side effects just before the stable release. When AI-found fixes land in the merge window, they get the full testing period instead of a few days.
The Linux 7.2 cycle showed the problem. Torvalds called 7.2-rc6 huge and the biggest rc6 in years by commit count, as TechRadar reported. A week later, on August 9, he released 7.2-rc7 and described its size as “the new normal.” He credited many of those fixes to review by AI tools.
A short timeline of AI in recent kernel cycles
- Early August 2026: Linux 7.2-rc6 becomes the biggest rc6 in years, with many fixes found through AI review.
- August 9, 2026: Linux 7.2-rc7 ships, and Torvalds calls large release candidates the new normal.
- October 2026: Torvalds publishes a branch of page cache patches that he says Claude Code produced under his direction, as Phoronix detailed.
- November 1, 2026: Linux 7.4-rc1 closes a record merge window, with AI-found fixes arriving earlier.
The Claude Code experiment
The October branch targets the page cache read path in memory management. It aims to cut contention on folio reference counts when many threads make small reads of one file. Phoronix reported that Claude Code also helped with test programs, review and a first draft of the cover letter. At that point, the patches sat on Torvalds’ own branch, and it was unclear whether they would go into Linux 7.4.
What else is in Linux 7.4
Phoronix listed the major features expected for this release before the merge window opened. Highlights include:
- HDMI 2.1 enabled by default in the AMDGPU driver, along with VRR and ALLM support.
- AMD Zen 6 work, including AMD P-State driver tuning.
- Upstream support for several Qualcomm Snapdragon X2 laptops.
- Google Tensor G5 and Pixel 10 support.
- Removal of the C Binder driver in favor of the Rust Binder driver.
Apple Silicon fans should keep expectations low. A separate Phoronix report on new SoC support says Apple M4 and A18 Pro support is basic. It is enough to boot the kernel and show a console, but most other features do not work yet. The M4 device trees cover six Macs, including the 2024 Mac mini and the 2025 MacBook Air models.
What changes for you
For most people, nothing changes today. Linux 7.4-rc1 is a test build, not a stable kernel. Phoronix expects the stable release around the end of December.
Testers and hobbyists can try the release candidates now. Owners of AMD Radeon GPUs with HDMI 2.1 displays, Snapdragon X2 laptops, and Zen 6 systems have the most to check. Regular users should wait for their distribution to ship 7.4 after the stable release.
What remains unclear
Several questions are still open. Torvalds wrote that people expect 7.4 to be the next LTS release, which may explain part of the rush. No LTS decision has been announced yet.
Torvalds also still has two pull requests in his inbox that he is “still thinking about.” They may or may not show up in rc2. The real test of his “healthier model” comes over the next few weeks. If the release candidates stay small, the early arrival of AI fixes will have paid off.
