per-cpu preemption

The tag per-cpu preemption on WindowsForum.com covers discussions about Linux kernel bugs where per-CPU data access must be made safe against preemption. A key example is CVE-2026-23374, a blktrace issue where __this_cpu_read() and __this_cpu_write() were used in preemptible contexts, leading to race conditions and inconsistent accounting. The fix ensures per-CPU access is safe under preemption, a subtle kernel hardening problem. Microsoft's Security Update Guide includes such CVEs as part of its Linux ecosystem coverage. Topics involve kernel security, race conditions, and preemption safety in low-level system code.