commit 1a0d9be53ec41ce335c5b586b6be2194d01eb23d
author Colin Cross <ccross@android.com> Mon Jul 14 14:31:15 2014 -0700
committer Colin Cross <ccross@android.com> Mon Jul 14 17:41:17 2014 -0700
tree 44ac87e4a4d5bd307d1990fdadcdf605fde666b7
parent b28ff9131363f7b4a698990da5748b2a88c3ed35

lmkd: make lmkd SCHED_FIFO

If kswapd runs more than lmkd it may throw away all page cache pages
before lmkd gets a chance to kill a process.  Make lmkd SCHED_FIFO
so it can react quickly to kernel low memory notifications.

Bug: 16236289
Change-Id: I46767b4ec81ef8638d0c9e47d168a68b62e3cac5

lmkd/lmkd.c

diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index a952855..a1261d1 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -748,7 +748,12 @@
 }
 
 int main(int argc __unused, char **argv __unused) {
+    struct sched_param param = {
+            .sched_priority = 1,
+    };
+
     mlockall(MCL_FUTURE);
+    sched_setscheduler(0, SCHED_FIFO, &param);
     if (!init())
         mainloop();