Merge "lmkd: retune rate at which processes are killed" (4d8a9caf) · Commits · e / os / android_system_core

lmkd/lmkd.c

+30 −6

Original line number	Diff line number	Diff line
		@@ -1260,6 +1260,8 @@ static struct proc *proc_get_heaviest(int oomadj) {
		return maxprocp;
		}

		static int last_killed_pid = -1;

		/* Kill one process specified by procp. Returns the size of the process killed */
		static int kill_one_process(struct proc* procp) {
		int pid = procp->pid;
		@@ -1304,6 +1306,8 @@ static int kill_one_process(struct proc* procp) {

		TRACE_KILL_END();

		last_killed_pid = pid;

		if (r) {
		ALOGE("kill(%d): errno=%d", pid, errno);
		goto out;
		@@ -1445,6 +1449,23 @@ enum vmpressure_level downgrade_level(enum vmpressure_level level) {
		level - 1 : level);
		}

		static bool is_kill_pending(void) {
		char buf[24];

		if (last_killed_pid < 0) {
		return false;
		}

		snprintf(buf, sizeof(buf), "/proc/%d/", last_killed_pid);
		if (access(buf, F_OK) == 0) {
		return true;
		}

		// reset last killed PID because there's nothing pending
		last_killed_pid = -1;
		return false;
		}

		static void mp_event_common(int data, uint32_t events __unused) {
		int ret;
		unsigned long long evcount;
		@@ -1490,7 +1511,11 @@ static void mp_event_common(int data, uint32_t events __unused) {
		}

		if (kill_timeout_ms) {
		if (get_time_diff_ms(&last_kill_tm, &curr_tm) < kill_timeout_ms) {
		// If we're within the timeout, see if there's pending reclaim work
		// from the last killed process. If there is (as evidenced by
		// /proc/<pid> continuing to exist), skip killing for now.
		if ((get_time_diff_ms(&last_kill_tm, &curr_tm) < kill_timeout_ms) &&
		(low_ram_device \|\| is_kill_pending())) {
		kill_skip_count++;
		return;
		}
		@@ -1633,7 +1658,7 @@ do_kill:
		min_score_adj = level_oomadj[level];
		}

		pages_freed = find_and_kill_processes(min_score_adj, pages_to_free);
		pages_freed = find_and_kill_processes(min_score_adj, 0);

		if (pages_freed == 0) {
		/* Rate limit kill reports when nothing was reclaimed */
		@@ -1641,14 +1666,13 @@ do_kill:
		report_skip_count++;
		return;
		}
		} else {
		/* If we killed anything, update the last killed timestamp. */
		last_kill_tm = curr_tm;
		}

		/* Log meminfo whenever we kill or when report rate limit allows */
		meminfo_log(&mi);
		if (pages_freed >= pages_to_free) {
		/* Reset kill time only if reclaimed enough memory */
		last_kill_tm = curr_tm;
		}

		if (use_minfree_levels) {
		ALOGI("Killing to reclaim %ldkB, reclaimed %ldkB, cache(%ldkB) and "