From 70c77df10296745bd874b1fdff7aa21e49662cb2 Mon Sep 17 00:00:00 2001
From: "Costa Tsaousis (ktsaou)" <costa@tsaousis.gr>
Date: Sun, 29 Jan 2017 18:39:58 +0200
Subject: [PATCH] allow users to configure netdata oom score

---
 src/daemon.c | 4 ++--
 src/daemon.h | 2 +-
 src/main.c   | 4 +++-
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/daemon.c b/src/daemon.c
index 4fd8ca5e..c125511a 100644
--- a/src/daemon.c
+++ b/src/daemon.c
@@ -189,7 +189,7 @@ int sched_setscheduler_idle(void) {
 #endif
 }
 
-int become_daemon(int dont_fork, const char *user)
+int become_daemon(int dont_fork, const char *user, int oom_score)
 {
     if(!dont_fork) {
         int i = fork();
@@ -239,7 +239,7 @@ int become_daemon(int dont_fork, const char *user)
     umask(0007);
 
     // adjust my Out-Of-Memory score
-    oom_score_adj(1000);
+    oom_score_adj(oom_score);
 
     // never become a problem
     if(sched_setscheduler_idle() != 0) {
diff --git a/src/daemon.h b/src/daemon.h
index b193602d..561e0fe9 100644
--- a/src/daemon.h
+++ b/src/daemon.h
@@ -8,7 +8,7 @@ extern void sig_handler_reload_health(int signo);
 
 extern int become_user(const char *username, int pid_fd);
 
-extern int become_daemon(int dont_fork, const char *user);
+extern int become_daemon(int dont_fork, const char *user, int oom_score);
 
 extern void netdata_cleanup_and_exit(int i);
 
diff --git a/src/main.c b/src/main.c
index fb547e44..18ad78a8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -338,6 +338,7 @@ int main(int argc, char **argv)
     int i, check_config = 0;
     int config_loaded = 0;
     int dont_fork = 0;
+    int oom_score = 1000;
     size_t wanted_stacksize = 0, stacksize = 0;
     pthread_attr_t attr;
 
@@ -616,6 +617,7 @@ int main(int argc, char **argv)
         // --------------------------------------------------------------------
 
         rrd_memory_mode = rrd_memory_mode_id(config_get("global", "memory mode", rrd_memory_mode_name(rrd_memory_mode)));
+        oom_score = (int)config_get_number("global", "OOM score", oom_score);
 
         // --------------------------------------------------------------------
 
@@ -755,7 +757,7 @@ int main(int argc, char **argv)
 #endif /* NETDATA_INTERNAL_CHECKS */
 
     // fork, switch user, create pid file, set process priority
-    if(become_daemon(dont_fork, user) == -1)
+    if(become_daemon(dont_fork, user, oom_score) == -1)
         fatal("Cannot daemonize myself.");
 
     info("netdata started on pid %d.", getpid());
-- 
2.39.2