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Suppress error log when timerslack_ns write fails for already dead process 

lmkd uses set_sched_priority to expedite killing of its victims and this
sometimes results in timerslack_ns writes for an process which is already
dead. These messages are detrimental during troubleshooting and do not
indicate a real problem, therefore need to be suppressed.

Bug: 124324891
Test: lmkd_unit_test

Change-Id: I5bc071b47d386c279dd9a56eee51dba7797f4520
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
This commit is contained in:
Suren Baghdasaryan 2019-02-12 17:30:26 -08:00
parent 4ecbe76354
commit 2bc522878d
1 changed files with 4 additions and 0 deletions
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4
libprocessgroup/task_profiles.cpp
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@ -90,6 +90,10 @@ bool SetTimerSlackAction::ExecuteForTask(int tid) const {
if (sys_supports_timerslack) {
auto file = StringPrintf("/proc/%d/timerslack_ns", tid);
if (!WriteStringToFile(std::to_string(slack_), file)) {
if (errno == ENOENT) {
// This happens when process is already dead
return true;
}
PLOG(ERROR) << "set_timerslack_ns write failed";
}
}