Merge "lmkd: Suppress error when accessing soft_limit_in_bytes for system_server" (d4463fd9) · Commits · e / os / android_system_core

lmkd/lmkd.c

+15 −1

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@

		#include <errno.h>
		#include <inttypes.h>
		#include <pwd.h>
		#include <sched.h>
		#include <signal.h>
		#include <stdbool.h>
		@@ -72,6 +73,9 @@
		#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
		#define EIGHT_MEGA (1 << 23)

		/* Defined as ProcessList.SYSTEM_ADJ in ProcessList.java */
		#define SYSTEM_ADJ (-900)

		/* default to old in-kernel interface if no memory pressure events */
		static int use_inkernel_interface = 1;
		static bool has_inkernel_module;
		@@ -302,6 +306,8 @@ static void cmd_procprio(LMKD_CTRL_PACKET packet) {
		char val[20];
		int soft_limit_mult;
		struct lmk_procprio params;
		bool is_system_server;
		struct passwd *pwdrec;

		lmkd_pack_get_procprio(packet, &params);

		@@ -355,7 +361,15 @@ static void cmd_procprio(LMKD_CTRL_PACKET packet) {
		"/dev/memcg/apps/uid_%d/pid_%d/memory.soft_limit_in_bytes",
		params.uid, params.pid);
		snprintf(val, sizeof(val), "%d", soft_limit_mult * EIGHT_MEGA);
		writefilestring(path, val, true);

		/*
		* system_server process has no memcg under /dev/memcg/apps but should be
		* registered with lmkd. This is the best way so far to identify it.
		*/
		is_system_server = (params.oomadj == SYSTEM_ADJ &&
		(pwdrec = getpwnam("system")) != NULL &&
		params.uid == pwdrec->pw_uid);
		writefilestring(path, val, !is_system_server);

		procp = pid_lookup(params.pid);
		if (!procp) {