On Tue, Aug 18, 2026 at 03:44:36PM -0700, Ziyang Men wrote: > > > +BTF_KFUNCS_START(bpf_rstat_common_kfunc_ids) > > > +BTF_ID_FLAGS(func, bpf_css_flush_rstat, KF_SLEEPABLE) > > > +BTF_ID_FLAGS(func, bpf_cgroup_base_stat, KF_SLEEPABLE) > > > > Why are these SLEEPABLE? > > > > The css_rstat_flush() calls might_sleep() and cond_resched().
I see. > The bpf_cgroup_base_stat() takes an rstat spinlock_t, which can sleep on > PREEMPT_RT. Is this actually required? This doesn't really make sense to me. Shouldn't what SLEEPABLE mean change on RT kernels instead? Thanks. -- tejun
