swap: Reclaim memory when LCD is off

Reclaim memory from BackgroundMru memory cgroup when LCD is off
to reserve memory.

This is one of patch to restore BackgroundReclaim configuration of resourced 6.0.

Change-Id: I3657689a11931f8f80deeaaebc64fcdc4dc35747
Signed-off-by: Unsung Lee <unsung.lee@samsung.com>

diff --git a/src/common/notifier.h b/src/common/notifier.h
index e3cd6d41c1a45e3bdeb370fbe9d19a08985309d4..676455477b8d3c8a8e57ef8319ac8b58a327f542 100644 (file)
--- a/src/common/notifier.h
+++ b/src/common/notifier.h
@@ -112,6 +112,8 @@ enum notifier_type {
        RESOURCED_NOTIFIER_LOW_BATTERY,
        RESOURCED_NOTIFIER_CPU_ON,
        RESOURCED_NOTIFIER_CPU_OFF,
+       RESOURCED_NOTIFIER_LCD_ON,
+       RESOURCED_NOTIFIER_LCD_OFF,
 
        RESOURCED_NOTIFIER_DEDUP_START,
        RESOURCED_NOTIFIER_DEDUP_SCAN,

diff --git a/src/process/proc-monitor.c b/src/process/proc-monitor.c
index 62485850e5128a934ca46758b05e8d9ab0eace83..474d76aad31eca37003eba93bd333865461fbba3 100644 (file)
--- a/src/process/proc-monitor.c
+++ b/src/process/proc-monitor.c
@@ -824,12 +824,13 @@ static void proc_dbus_systemservice_handler(GVariant *params)
 EXPORT_TEST void proc_dbus_lcd_on(GVariant *params)
 {
        current_lcd_state = LCD_STATE_ON;
-       /* nothing */
+       resourced_notify(RESOURCED_NOTIFIER_LCD_ON, NULL);
 }
 
 EXPORT_TEST void proc_dbus_lcd_off(GVariant *params)
 {
        current_lcd_state = LCD_STATE_OFF;
+       resourced_notify(RESOURCED_NOTIFIER_LCD_OFF, NULL);
 }
 
 EXPORT_TEST void booting_done_signal_handler(GVariant *params)

diff --git a/src/resource-limiter/memory/lowmem.c b/src/resource-limiter/memory/lowmem.c
index 7b990d3dcdd22d01588b6a686c7f44e355e16bc2..08c82a6f2790f6d6f7842b6d2f54ae3504b5e0de 100644 (file)
--- a/src/resource-limiter/memory/lowmem.c
+++ b/src/resource-limiter/memory/lowmem.c
@@ -1365,6 +1365,27 @@ int lowmem_control_handler(void *data)
        return RESOURCED_ERROR_NONE;
 }
 
+static int lowmem_bg_reclaim_handler(void *data)
+{
+        if (swap_get_state() != SWAP_ON)
+                return RESOURCED_ERROR_NONE;
+
+        if (!g_bg_reclaim)
+                return RESOURCED_ERROR_NONE;
+
+        /*
+         * Proactively reclaiming memory used by long-lived background processes
+         * (such as widget instances) may be efficient on devices with limited
+         * memory constraints. The pages used by such processes could be reclaimed
+         * (if swap is enabled) earlier than they used to while minimizing the
+         * impact on the user experience.
+         */
+        resourced_notify(RESOURCED_NOTIFIER_SWAP_START,
+                       get_memcg_info(MEMCG_BACKGROUND_MRU)->name);
+
+        return RESOURCED_ERROR_NONE;
+}
+
 static inline int calculate_threshold_size(double ratio)
 {
        unsigned long long size_bytes = (double)totalram_bytes * ratio / 100.0;
@@ -1498,6 +1519,7 @@ static int lowmem_init(void)
 
        register_notifier(RESOURCED_NOTIFIER_APP_PRELAUNCH, lowmem_prelaunch_handler);
        register_notifier(RESOURCED_NOTIFIER_MEM_CONTROL, lowmem_control_handler);
+       register_notifier(RESOURCED_NOTIFIER_LCD_OFF, lowmem_bg_reclaim_handler);
 
        return ret;
 }
@@ -1510,6 +1532,7 @@ static int lowmem_exit(void)
 
        unregister_notifier(RESOURCED_NOTIFIER_APP_PRELAUNCH, lowmem_prelaunch_handler);
        unregister_notifier(RESOURCED_NOTIFIER_MEM_CONTROL, lowmem_control_handler);
+       unregister_notifier(RESOURCED_NOTIFIER_LCD_OFF, lowmem_bg_reclaim_handler);
 
        return RESOURCED_ERROR_NONE;
 }