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[system/core] CGROUP : Fix duplicate setting the same policy

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Get current schedule policy first before setting.

Signed-off-by: Firefly <service@t-firefly.com>
This commit is contained in:
Firefly
2015-08-22 14:58:08 +08:00
committed by djw
parent 5cae4392b4
commit 13097eaccf
1 changed files with 14 additions and 8 deletions
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22
system/core/libcutils/sched_policy.c
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@ -1,16 +1,16 @@
/*
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
@ -64,6 +64,12 @@ static int add_tid_to_cgroup(int tid, SchedPolicy policy)
{
int fd;
SchedPolicy tmp_policy;
get_sched_policy(tid,&tmp_policy);
if (tmp_policy == policy) {
return 0;
}
switch (policy) {
case SP_BACKGROUND:
fd = bg_cgroup_fd;