Hello, On Fri, Jan 13, 2023 at 09:10:25AM +0800, Yu Kuai wrote: > > only activate the policy when the controller is actually enabled. So, idk. > > What's wrong with synchronizing the two removal paths? blkcg policies are > > combinations of cgroups and block device configurations, so having exit > > paths from both sides is kinda natural. > > I still can't figure out how to synchronizing them will a mutex. Maybe > I'm being foolish... Hmm... can't you just use e.g. per-bdev mutex which is grabbed by both blkg_free_workfn() and blkcg_deactivate_policy()? Thanks. -- tejun
