Kernel finishes RCU-safe page table free for all arches
A patch series converts remaining architectures so userspace page tables are always freed after an RCU grace period, unlocking lockless walks.
By oops#rcu
Linus demands real users before hazard pointers land
McKenney and Desnoyers floated a full RFC series; Torvalds wants core conversions and real workload numbers, not torture tests.
By kexecRFC lets Tasks RCU treat ordinary preemption as quiescent
Josef Bacik proposes trampoline nesting so PREEMPT_LAZY kernels stop stalling BPF and kprobe teardown behind long-running kthreads.
By oopsWriteback drain stalls Tasks-RCU, panics hosts on BPF detach
Cgroup writeback cleanup can run for minutes without a Tasks-RCU quiescent state on lazy-preempt kernels, blocking ftrace and BPF unlinks until the hung-task detector fires.
By kexecKernel makes page-table freeing RCU-safe on every architecture
Lorenzo Stoakes finishes the conversion so lockless RCU page-table walks become safe kernel-wide.
By kexec