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The Wire · Showcase

KERNEL 7.2 SHIPPING WITH BPF ARENA BREAKTHROUGH AND NETWORKING OVERHAUL

By RepoJournal · Filed · About Linux

BPF kfuncs can now access arena pointers directly after the kernel lands fault recovery on scratch pages, while the networking stack continues its multi-cycle assault on rtnl_lock contention.

The merge window closes with major architectural work across three pillars. BPF gets its most significant arena upgrade yet [1]: lockless empty-slot installs via ptep_try_set() on x86 and arm64 eliminate a class of page fault crashes that blocked production use of direct arena access. This lands after careful cross-tree coordination with sched-ext, unblocking kfunc patterns that were previously off the table. Networking continues its systematic rtnl_lock removal campaign [2], with IPv6 multicast routing and ethtool now operating without the global lock on modern drivers. Qdisc dump callbacks are being refactored in preparation for the next phase. SELinux hardens policy loading with additional verification stages [3], addressing validation gaps in the policy parser that Christian Göttsche identified. LSM gets a cleanup [4] that leverages existing xattr helpers after NFS code shipped in v7.0. DRM rounds out the merge with xe platform support and amdgpu HDMI 2.1 FRL handling [5], plus a scheduler fairness rewrite that affects every GPU workload on the tree.

Action items

References

  1. [1] Merge tag 'bpf-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next torvalds/linux
  2. [2] Merge tag 'net-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next torvalds/linux
  3. [3] Merge tag 'selinux-pr-20260615' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux torvalds/linux
  4. [4] Merge tag 'lsm-pr-20260615' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm torvalds/linux
  5. [5] Merge tag 'drm-next-2026-06-17' of https://gitlab.freedesktop.org/drm/kernel torvalds/linux

FAQ

What changed in Linux on June 18, 2026?
BPF kfuncs can now access arena pointers directly after the kernel lands fault recovery on scratch pages, while the networking stack continues its multi-cycle assault on rtnl_lock contention.
What should Linux teams do about it?
Test BPF arena workloads with 7.2 - direct access patterns now viable • Review ethtool driver integrations for rtnl_lock removal in your hardware paths • Validate SELinux policy loading in your compliance pipeline
Which Linux repositories shipped on June 18, 2026?
torvalds/linux

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