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cgroup: drop @skip_css from cgroup_taskset_for_each()

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If !NULL, @skip_css makes cgroup_taskset_for_each() skip the matching
css.  The intention of the interface is to make it easy to skip css's
(cgroup_subsys_states) which already match the migration target;
however, this is entirely unnecessary as migration taskset doesn't
include tasks which are already in the target cgroup.  Drop @skip_css
from cgroup_taskset_for_each().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
This commit is contained in:
Tejun Heo 2014-02-13 06:58:41 -05:00
parent cb0f1fe9ba
commit 924f0d9a20
8 changed files with 11 additions and 15 deletions
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2
kernel/cgroup_freezer.c
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@ -187,7 +187,7 @@ static void freezer_attach(struct cgroup_subsys_state *new_css,
* current state before executing the following - !frozen tasks may
* be visible in a FROZEN cgroup and frozen tasks in a THAWED one.
*/
cgroup_taskset_for_each(task, new_css, tset) {
cgroup_taskset_for_each(task, tset) {
if (!(freezer->state & CGROUP_FREEZING)) {
__thaw_task(task);
} else {