# Linux 7.4 merge window sets record with 19,671 commits, kernel nears 42 million lines

> **Key takeaway:** The Linux 7.4 merge window brought nearly half a million lines of new code and the highest commit count on record for a kernel development cycle.

**Published:** 2026-11-01T10:28:22+00:00 
**Source:** Phoronix Benchmarks & Drivers 
**Category:** kernel-os 
**Canonical URL:** https://fosswire.org/news/linux-74-merge-window-sets-record-with-19671-commits-kernel-.html 

## Summary
The Linux 7.4 merge window has concluded with unprecedented scale, delivering 19,671 commits since the v7.3 release and expanding the kernel source tree to 41,605,120 total lines. This represents the busiest merge window in kernel history by commit volume, surpassing the 16,267 commits seen during the Linux 7.3 cycle and far exceeding typical periods such as the 13,963 commits for v7.1. The codebase grew by nearly 500,000 lines of actual detected code, excluding comments and blank lines, bringing the total to 31,417,938 lines of code alongside 4,993,604 comment lines and 5,193,578 blank lines.

Linus Torvalds is expected to release Linux 7.4-rc1 on schedule despite earlier speculation that the merge window might extend an extra week due to holiday scheduling conflicts. The rapid processing of merge requests suggests the additional time was unnecessary. At this growth trajectory, the kernel source tree is projected to exceed 42 million total lines by the Linux 7.5 cycle expected in early 2027.

## Merge window metrics and code growth
- **Commit volume record:** The 19,671 commits since Linux v7.3 represent the highest count ever recorded for a kernel merge window, exceeding the previous cycle's 16,267 commits by approximately 21%.
- **Code line expansion:** Detected actual code grew by roughly 455,000 lines to reach 31,417,938, with comment lines increasing to 4,993,604 and blank lines to 5,193,578.
- **Total source tree size:** The aggregate kernel source tree now stands at 41,605,120 lines, up from 41,019,555 at the v7.3 tag, putting the 42 million milestone within reach for the 7.5 cycle.
- **Merge window duration:** The standard two-week merge window was maintained despite Torvalds's earlier consideration of a three-week window due to holiday overlap, indicating efficient queue management.
- **Growth trajectory:** The accelerating commit counts across recent cycles (13,963 for v7.1, 14,395 for v7.2, 16,267 for v7.3, 19,671 for v7.4) suggest sustained expansion in kernel development activity.

## Why it matters
The record commit volume in Linux 7.4 signals intensified development across kernel subsystems, which will eventually reach distributions and enterprise deployments through stable releases in the coming months. For distribution maintainers and system administrators, this scale of change implies broader hardware enablement and subsystem updates to validate, while the sustained growth trajectory reinforces the kernel's position as one of the most actively developed software projects in the open-source ecosystem.