cgroup: track migration context in cgroup_mgctx

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cgroup migration is performed in four steps - css_set preloading,
addition of target tasks, actual migration, and clean up.  A list
named preloaded_csets is used to track the preloading.  This is a bit
too restricted and the code is already depending on the subtlety that
all source css_sets appear before destination ones.

Let's create struct cgroup_mgctx which keeps track of everything
during migration.  Currently, it has separate preload lists for source
and destination csets and also embeds cgroup_taskset which is used
during the actual migration.  This moves struct cgroup_taskset
definition to cgroup-internal.h.

This patch doesn't cause any functional changes.

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

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This commit is contained in:

Tejun Heo 2017-01-15 19:03:41 -05:00

parent d8ebf5191d

commit e595cd7069

3 changed files with 122 additions and 98 deletions

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66

kernel/cgroup/cgroup-internal.h

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10

kernel/cgroup/cgroup-v1.c

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144

kernel/cgroup/cgroup.c

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