commit ad2fd9150bdbb9abdbc26c6a395f007b4cca7567
author Suren Baghdasaryan <surenb@google.com> Fri Dec 08 13:08:41 2017 -0800
committer Suren Baghdasaryan <surenb@google.com> Tue Jan 16 15:42:25 2018 -0800
tree 6afdaba5eb6381e5d8a4d2bd30626d9c4838963e
parent dc95eeadf41ce40650d9f12f53ffa47e43ba81b4

lmkd: change defaults to disable event upgrade/downgrade logic

vmpressure upgrade/downgrade logic based on swap utilization works well
for low memory devices because of a small swap size, however for high
performance devices this measure is not a good indication of the memory
pressure because of large swap resources. This change sets the default
levels to disable upgrade/downgrade logic by default and each device
can set these properties appropriately.

Bug: 63631020
Test: alloc-stress

Change-Id: Ifd4fbd4d6bb3e82f0f87b029df94934f1e7b1c9c
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

lmkd/lmkd.c

diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index 25d3170..e76c07c 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -921,9 +921,14 @@
     level_oomadj[VMPRESS_LEVEL_CRITICAL] =
         property_get_int32("ro.lmk.critical", 0);
     debug_process_killing = property_get_bool("ro.lmk.debug", false);
-    enable_pressure_upgrade = property_get_bool("ro.lmk.critical_upgrade", false);
-    upgrade_pressure = (int64_t)property_get_int32("ro.lmk.upgrade_pressure", 50);
-    downgrade_pressure = (int64_t)property_get_int32("ro.lmk.downgrade_pressure", 60);
+
+    /* By default disable upgrade/downgrade logic */
+    enable_pressure_upgrade =
+        property_get_bool("ro.lmk.critical_upgrade", false);
+    upgrade_pressure =
+        (int64_t)property_get_int32("ro.lmk.upgrade_pressure", 100);
+    downgrade_pressure =
+        (int64_t)property_get_int32("ro.lmk.downgrade_pressure", 100);
     is_go_device = property_get_bool("ro.config.low_ram", false);
 
     if (mlockall(MCL_CURRENT | MCL_FUTURE))