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    SubjectRe: [PATCH v1 3/3] cgroup: relax common ancestor restriction for direct descendants
    Hello, James.

    On Thu, Jul 21, 2016 at 08:16:34AM -0700, James Bottomley wrote:
    > > That'd be one side. The other side is the one moving. Let's say the
    > > system admin thing wants to move all processe from A proper to B. It
    > > would do that by draining processes from A's procs file into B's and
    > > even that is multistep and can race.
    >
    > So the second part is that once we allow the creation of
    > subdirectories, there's no unified tasks file, so there's no way of
    > draining A proper without enumerating and descending into the cgroupns
    > created subtrees in A?

    Not that. If it races, it will end up moving processes which are no
    longer in A proper. Such operations or distinctions might not be
    meaningful under many circumstances but it'd be a pretty big hole in
    the API to create and I can't really declare these holes are gonna be
    okay with confidence.

    Thanks.

    --
    tejun

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