Commit 2bc52287 authored Feb 12, 2019 by Suren Baghdasaryan

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>

parent 4ecbe763

libprocessgroup/task_profiles.cpp

+4 −0

Original line number	Diff line number	Diff line
		@@ -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";
		}
		}