cgroup: separate out taskset operations from cgroup_migrate()

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Currently, cgroup_migreate() implements large part of the migration
logic inline including building the target taskset and actually
migrating them.  This patch separates out the following taskset
operations.

 CGROUP_TASKSET_INIT()		: taskset initializer
 cgroup_taskset_add()		: add a task to a taskset
 cgroup_taskset_migrate()	: migrate a taskset to the destination cgroup

This will be used to implement atomic multi-process migration in
cgroup_update_dfl_csses().  This is pure reorganization which doesn't
introduce any functional changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>

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Tejun Heo 2015-09-11 15:00:21 -04:00

parent 9af2ec45c2

commit adaae5dcf8

1 changed files with 125 additions and 86 deletions

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kernel/cgroup.c

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