On Fri, Jun 28, 2024 at 10:04:20AM GMT, Li Lingfeng <lilingfeng@xxxxxxxxxxxxxxx> wrote: > I think it may be more appropriate to remove the limit of bios after the > cgroup is deleted, rather than let the bios continue to be throttled by a > non-existent cgroup. I'm not that familiar with this part -- can this also happen for IOs submitted by an exited task? (In contrast to a running task migrated elsewhere.) > If the limit is set too low, and the original cgourp has been deleted, we > now have no way to make the bios complete immediately, but to wait for the > bios to slowly complete under the limit. It makes some sense, it's not unlike reparenting of memcg objects, IIRC flushed bios would actually be passed to a parent throtl_grp, right? Thanks, Michal
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