Snap for 5101444 from afb3a15f39e73978c071a58d3466993293c6d3b1 to pi-qpr2-release
Change-Id: I5a5f1437eab7c9919ded24651fef547a0a920677
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index 11151ca..ef1bf10 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -27,8 +27,8 @@
#include <sys/eventfd.h>
#include <sys/mman.h>
#include <sys/socket.h>
-#include <sys/types.h>
#include <sys/sysinfo.h>
+#include <sys/types.h>
#include <unistd.h>
#include <cutils/properties.h>
@@ -1029,6 +1029,8 @@
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;
@@ -1072,6 +1074,8 @@
TRACE_KILL_END();
+ last_killed_pid = pid;
+
if (r) {
ALOGE("kill(%d): errno=%d", pid, errno);
goto out;
@@ -1219,6 +1223,22 @@
(to->tv_usec - from->tv_usec) / 1000;
}
+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;
@@ -1260,7 +1280,11 @@
gettimeofday(&curr_tm, NULL);
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;
}
@@ -1397,7 +1421,7 @@
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 */
@@ -1405,10 +1429,8 @@
report_skip_count++;
return;
}
- }
-
- if (pages_freed >= pages_to_free) {
- /* Reset kill time only if reclaimed enough memory */
+ } else {
+ /* If we killed anything, update the last killed timestamp. */
last_kill_tm = curr_tm;
}
