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Merge "Allow setting oom_score_adj for services spawned from init"

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Marco Nelissen 2016-09-02 14:46:08 +00:00 committed by Gerrit Code Review
commit b7aef300c4
3 changed files with 31 additions and 2 deletions
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4
init/readme.txt
View file

@ -191,6 +191,10 @@ priority <priority>
namespace <pid|mnt>
Enter a new PID or mount namespace when forking the service.
oom_score_adjust <value>
Sets the child's /proc/self/oom_score_adj to the specified value,
which must range from -1000 to 1000.
Triggers
--------

26
init/service.cpp
View file

@ -163,7 +163,7 @@ Service::Service(const std::string& name, const std::string& classname,
: name_(name), classname_(classname), flags_(0), pid_(0), time_started_(0),
time_crashed_(0), nr_crashed_(0), uid_(0), gid_(0), namespace_flags_(0),
seclabel_(""), ioprio_class_(IoSchedClass_NONE), ioprio_pri_(0),
priority_(0), args_(args) {
priority_(0), oom_score_adjust_(-1000), args_(args) {
onrestart_.InitSingleTrigger("onrestart");
}
@ -176,7 +176,7 @@ Service::Service(const std::string& name, const std::string& classname,
time_started_(0), time_crashed_(0), nr_crashed_(0), uid_(uid), gid_(gid),
supp_gids_(supp_gids), namespace_flags_(namespace_flags),
seclabel_(seclabel), ioprio_class_(IoSchedClass_NONE), ioprio_pri_(0),
priority_(0), args_(args) {
priority_(0), oom_score_adjust_(-1000), args_(args) {
onrestart_.InitSingleTrigger("onrestart");
}
@ -419,6 +419,18 @@ bool Service::ParseNamespace(const std::vector<std::string>& args, std::string*
return true;
}
bool Service::ParseOomScoreAdjust(const std::vector<std::string>& args, std::string* err) {
oom_score_adjust_ = std::stol(args[1], 0, 10);
if (oom_score_adjust_ < -1000 || oom_score_adjust_ > 1000) {
*err = "oom_score_adjust value must be in range -1000 - +1000";
return false;
}
return true;
}
bool Service::ParseSeclabel(const std::vector<std::string>& args, std::string* err) {
seclabel_ = args[1];
return true;
@ -476,6 +488,8 @@ Service::OptionParserMap::Map& Service::OptionParserMap::map() const {
{"keycodes", {1, kMax, &Service::ParseKeycodes}},
{"oneshot", {0, 0, &Service::ParseOneshot}},
{"onrestart", {1, kMax, &Service::ParseOnrestart}},
{"oom_score_adjust",
{1, 1, &Service::ParseOomScoreAdjust}},
{"namespace", {1, 2, &Service::ParseNamespace}},
{"seclabel", {1, 1, &Service::ParseSeclabel}},
{"setenv", {2, 2, &Service::ParseSetenv}},
@ -611,6 +625,14 @@ bool Service::Start() {
return false;
}
if (oom_score_adjust_ != -1000) {
std::string oom_str = StringPrintf("%d", oom_score_adjust_);
std::string oom_file = StringPrintf("/proc/%d/oom_score_adj", pid);
if (!WriteStringToFile(oom_str, oom_file)) {
PLOG(ERROR) << "couldn't write oom_score_adj: " << strerror(errno);
}
}
time_started_ = gettime();
pid_ = pid;
flags_ |= SVC_RUNNING;

3
init/service.h
View file

@ -126,6 +126,7 @@ private:
bool ParseKeycodes(const std::vector<std::string>& args, std::string* err);
bool ParseOneshot(const std::vector<std::string>& args, std::string* err);
bool ParseOnrestart(const std::vector<std::string>& args, std::string* err);
bool ParseOomScoreAdjust(const std::vector<std::string>& args, std::string* err);
bool ParseNamespace(const std::vector<std::string>& args, std::string* err);
bool ParseSeclabel(const std::vector<std::string>& args, std::string* err);
bool ParseSetenv(const std::vector<std::string>& args, std::string* err);
@ -165,6 +166,8 @@ private:
int ioprio_pri_;
int priority_;
int oom_score_adjust_;
std::vector<std::string> args_;
};