d7157c22af
The memcg.limit_percent option can be used to limit the cgroup's max RSS to the given value as a percentage of the device's physical memory. The memcg.limit_property option specifies the name of a property that can be used to control the cgroup's max RSS. These new options correspond to the arguments to the limitProcessMemory function in frameworks/av/media/libmedia/MediaUtils.cpp; this will allow us to add these options to the rc files for the programs that call this function and then remove the callers in a later change. There is also a change in semantics: the memcg.* options now have an effect on all devices which support memory cgroups, not just those with ro.config.low_ram or ro.config.per_app_memcg set to true. This change also brings the semantics in line with the documentation, so it looks like the previous semantics were unintentional. Change-Id: I9495826de6e477b952e23866743b5fa600adcacb Bug: 118642754
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/*
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* Copyright 2014 Google, Inc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _PROCESSGROUP_H_
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#define _PROCESSGROUP_H_
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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// Return 0 and removes the cgroup if there are no longer any processes in it.
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// Returns -1 in the case of an error occurring or if there are processes still running
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// even after retrying for up to 200ms.
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int killProcessGroup(uid_t uid, int initialPid, int signal);
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// Returns the same as killProcessGroup(), however it does not retry, which means
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// that it only returns 0 in the case that the cgroup exists and it contains no processes.
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int killProcessGroupOnce(uid_t uid, int initialPid, int signal);
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int createProcessGroup(uid_t uid, int initialPid, bool memControl = false);
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// Set various properties of a process group. For these functions to work, the process group must
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// have been created by passing memControl=true to createProcessGroup.
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bool setProcessGroupSwappiness(uid_t uid, int initialPid, int swappiness);
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bool setProcessGroupSoftLimit(uid_t uid, int initialPid, int64_t softLimitInBytes);
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bool setProcessGroupLimit(uid_t uid, int initialPid, int64_t limitInBytes);
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void removeAllProcessGroups(void);
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__END_DECLS
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#endif
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