Writeback 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 kexec#cgroup
BPF gains kfunc to drive proactive memcg reclaim
A sleepable SYSCALL-only helper lets policy programs reclaim from chosen cgroups without writing memory.reclaim.
By kexecLinux virtual swap decouples zswap pages from disk slots
Nhat Pham's v4 series adds a persistent virtual swap device so compressed and zero-filled pages no longer reserve physical swap capacity.
By oopsBPF cgroup link update fixed for stack out-of-bounds write
Replacement programs were matched only by type, so incompatible sock_addr and LSM hooks could clobber adjacent stack state.
By kexec