On Thu, Jun 03, 2021 at 06:31:53PM -0700, Roman Gushchin wrote: > To solve the problem inodes should be eventually detached from the > corresponding writeback structure. It's inefficient to do it after > every writeback completion. Instead it can be done whenever the > original memory cgroup is offlined and writeback structure is getting > killed. Scanning over a (potentially long) list of inodes and detach > them from the writeback structure can take quite some time. To avoid > scanning all inodes, attached inodes are kept on a new list (b_attached). > To make it less noticeable to a user, the scanning and switching is performed > from a work context. Sorry for chiming in late but the series looks great to me and the only comment I have is the migration target on the last patch, which isn't a critical issue. Please feel free to add Acked-by: Tejun Heo <tj@xxxxxxxxxx> Thanks. -- tejun
