Linux 7.0 stalls again as rc6 swells with last-minute silicon tweaks

A quiet rc5 gave kernel watchers hope that Linux 7.0 would hit general release on schedule. Then came rc6: a fat 320-patch drop that shatters the late-cycle calm and forces Linus Torvalds to warn the merge window “is not closing the way it should.”

The spike is not random. Intel’s Nova Lake and AMD’s Zen 6 silicon landed in the same week, each carrying micro-code updates, power-table rewrites and firmware hand-off changes that touch everything from the memory allocator to the sound stack. Drivers for graphics, NICs and audio ate half the diff; ext4 and XFS picked up the rest, patching edge-case races under sustained 200 Gbit traffic. Torvalds accepted the bulk anyway: “If we wait, distros ship the code unvetted.” Translation: merge now or regret later.

Hardware timelines trump kernel tradition

Linux has slipped before—7.0 is already two weeks behind 6.9’s cadence—but this cycle exposes a deeper tension. CPU vendors no longer align launches with kernel schedules; they drop documentation weeks before silicon ships and expect open-source to absorb the delta. The result is a rc6 that behaves like an rc3, pushing the final cut to mid-May at the earliest. Torvalds hinted at an rc8, something not seen since the Spectre meltdown days.

Ubuntu 26.04 LTS beta ships today with the 7.0 rc6 kernel onboard, betting stability on back-ports rather than waiting for the tag. Red Hat and SUSE are holding their enterprise snapshots until rc7 clears, freezing hardware enablement in a separate branch. The split reveals how commercial pressure now dictates kernel pace more than upstream etiquette.

No crashes, just calendar carnage

None of the patches trigger build failures or boot loops—QA farms at Intel and AMD have cycled the code for days. The risk is subtler: last-minute driver churn seeds latent regressions that surface only under real workloads six months later. Torvalds knows it; his rc6 pull note ends with a terse “test harder.”

Expect rc7 in ten days. If the diffstat stays above 150 patches, rc8 becomes mandatory and the holiday release window evaporates. Kernel maintainers will spend May cherry-picking instead of celebrating. The silicon treadmill wins again.