On Mon, Aug 10, 2026 at 10:00:55AM -1000, Tejun Heo wrote: > Hello, > > On Fri, Aug 07, 2026 at 12:37:31PM -0700, Ziyang Men wrote: > > +__bpf_kfunc struct blkcg *bpf_get_root_blkcg(void) > > +__bpf_kfunc struct blkcg *bpf_get_blkcg(struct cgroup_subsys_state *css) > > +__bpf_kfunc void bpf_put_blkcg(struct blkcg *blkcg) > > +__bpf_kfunc void bpf_blkcg_flush_stats(struct blkcg *blkcg) > > I wonder whether making the above deal with css's would make more sense so > that we don't end up with per-subsystem iterators. If casting to per-subsys > type is necessary, we can provide RCU protected cast kfucns. >
Hi Tejun, (sorry for asking dumb questions) is the concern you have is that with the current approach, we will have get_root/get/put kfuncs for each subsystem or something else? Also how will the current approach leads to per-subsystem iterators?
