PREEMPT_RT doesn't just make spinlocks sleep—it exposes three implicit contracts that preempt_disable() was silently fulfilling. Understanding sleeping spinlocks…

https://dev.to/raghu_bharadwaj_404e60eb0c/what-preemptrt-changes-sleeping-spinlocks-part-1-3dhm

#opensource #Linux

Linux mainline: massive BPF verifier hardening, xHCI fixes, scheduler and RT stability

A wave of BPF security fixes closes verifier bypasses, while USB, scheduler, tracing, a…

#BpfVerifier #PreemptRt #Scheduler #SecurityHardening #Tracing #Xhci

https://kerneldispatch.com/posts/mainline-2026-09-07