From f8857cc24a54393f904fc4918bd5c2b6adf672e2 Mon Sep 17 00:00:00 2001
From: Colin Cross <ccross@android.com>
Date: Fri, 11 Jul 2014 17:16:56 -0700
Subject: [PATCH] lmkd: kill a process if zoneinfo can't be read

Opening /proc/zoneinfo may return -ENOMEM under memory pressure,
assume something needs to be killed if that happens.

Bug: 16236289
Change-Id: I25aab09f4c3f2b9e176eaaeca94fd6bd790dad4e
---
 lmkd/lmkd.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index 2362cbfa3..a534a245f 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -660,8 +660,10 @@ static void mp_event(uint32_t events __unused) {
     if (time(NULL) - kill_lasttime < KILL_TIMEOUT)
         return;
 
-    if (zoneinfo_parse(&mi) < 0)
-        return;
+    while (zoneinfo_parse(&mi) < 0) {
+        // Failed to read /proc/zoneinfo, assume ENOMEM and kill something
+        find_and_kill_process(0, 0, true);
+    }
 
     other_free = mi.nr_free_pages - mi.totalreserve_pages;
     other_file = mi.nr_file_pages - mi.nr_shmem;