Messages in this thread | | | Date | Tue, 31 May 2022 07:22:35 -1000 | From | Tejun Heo <> | Subject | Re: [PATCH] cgroup: wait for css offline when rmdir |
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On Tue, May 31, 2022 at 07:19:31AM -1000, Tejun Heo wrote: > Maybe just keep the sequence numbers for started and completed offline > operations and wait for completed# to reach the started# on memcg alloc > failure and retry? Note that we can get live locked, so have to remember the > sequence number to wait for at the beginning. Or, even simpler, maybe it'd > be enough to just do synchronize_rcu() and then wait for the offline wait > once and retry.
Also, given that it's an memcg ID issue. It probably makes sense to implement it on the memcg side.
Thanks.
-- tejun
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