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    SubjectRe: [RFC][PATCH 2/5] memcg: uncharge in batched manner
    Balbir Singh wrote:
    >> > Does this effect deleting of a group and delay it by a large amount?
    >> >
    >> plz see what cgroup_release_and_xxxx fixed. This is not for delay
    >> but for race-condition, which makes rmdir sleep permanently.
    > I've seen those patches, where rmdir() can hang. My conern was time
    > elapsed since we do css_get() and do a cgroup_release_and_wake_rmdir()
    plz read unmap() and truncate() code.
    The number of pages handled without cond_resched() is limited.


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