Linux Kernel Daily: Networking Scale-Up and Kernel Hardening
A massive networking merge leads the day, stripping out the central networking lock and boosting TCP and bridge performance. Parallel pulls harden keys, sandboxing, and scheduling against leaks, hangs, and memory lifetime bugs.
Duration: PT2M6S
Episode overview
This episode is a short developer briefing from Linux Kernel Daily.
It explains recent repository work in plain language.
- Show: Linux Kernel Daily
- Published: 2026-10-23T06:01:04Z
- Audio duration: PT2M6S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning, it's Friday, October 23rd, 2026, and this is Linux Kernel Daily.
The lead story is scale. The net next merge for 7.4 centers on removing dependence on the kernel's central networking lock, alongside measurable forwarding gains and new hardware support.
On locking, neighbor tables are now per network namespace with inheritance controlled by a new system control, device status reads use the instance lock instead of the global lock, and route cleanup at device teardown is batched. For developers running containers or frequent namespace churn, that means less…
Second, security and isolation. The keys pull fixes a direct address leak, where key hashes mixed in kernel addresses and weakened address layout randomization. It now uses an ephemeral hash with unique identifiers. Landlock adds composable controls for namespace types and Linux capabilities, with a mount race fix.…
Third, scheduling and device memory. The extended scheduler can now run proxy execution alongside custom schedulers, add lazy preemption, and improve parent-child CPU delegation. Cgroup control writes that could hang are now interruptible, with partition fixes. RDMA and IOMMU work is largely robustness:…
Wha…
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