Mastodawn

#Linux 7.0 removed a CPU scheduling mode #PostgreSQL (a widely deployed open source database) relied on for internal locking. Result: throughput on AWS Graviton4 (Amazon ARM servers) dropped to 49% of normal.

The kernel team says PostgreSQL should adopt RSEQ, a newer Linux API for safe lock restarts. PostgreSQL cannot ship that before Linux 7.0 goes stable mid-April.

Ubuntu 26.04 LTS ships April 23. LTS means five years. Teams on AWS ARM who upgrade will hit this silently.

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Can Artuc

If you're curious about "Elephant in the room": https://www.canartuc.com/linux-70s-postgresql-crisis-openclaws-triple-cve-tigerfs/

📬 Linux 7.0's PostgreSQL Crisis, OpenClaw's Triple CVE, TigerFS

Linux 7.0-rc7 ships days before stable with PostgreSQL throughput halved on AWS Graviton4 and no fix in sight. OpenClaw collects three critical CVEs in three months. TigerFS mounts PostgreSQL as a filesystem for AI agents.

Can Artuc