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 318337363585c58bdbaadf4664210e1ca50d1d49..eb188fedcf98314c895d5d72dab93c678f666af7 100644 (file)
--- a/src/process/proc-monitor.c
+++ b/src/process/proc-monitor.c
@@ -1068,12 +1068,13 @@ 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-controller.c b/src/resource-limiter/memory/lowmem-controller.c
index 7341946f7ee2a83dcd643da0aa70fab64fde878d..ecfcf3e950389ff5d56b5ab564bfc5c111eea0b1 100644 (file)
--- a/src/resource-limiter/memory/lowmem-controller.c
+++ b/src/resource-limiter/memory/lowmem-controller.c
@@ -393,6 +393,27 @@ static 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 (!is_bg_reclaim_supported())
+                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 void medium_cb(struct lowmem_control *ctl)
 {
        if (ctl->status == LOWMEM_RECLAIM_DONE)
@@ -530,6 +551,7 @@ static int lowmem_controller_initialize(void *data)
        lowmem_register_mem_level_controller(MEM_LEVEL_OOM, oom_mem_control);
 
        register_notifier(RESOURCED_NOTIFIER_MEM_CONTROL, lowmem_control_handler);
+       register_notifier(RESOURCED_NOTIFIER_LCD_OFF, lowmem_bg_reclaim_handler);
 
        return RESOURCED_ERROR_NONE;
 }
@@ -537,6 +559,7 @@ static int lowmem_controller_initialize(void *data)
 static int lowmem_controller_finalize(void *data)
 {
        unregister_notifier(RESOURCED_NOTIFIER_MEM_CONTROL, lowmem_control_handler);
+       unregister_notifier(RESOURCED_NOTIFIER_LCD_OFF, lowmem_bg_reclaim_handler);
 
        return RESOURCED_ERROR_NONE;
 }

diff --git a/src/resource-limiter/memory/lowmem.c b/src/resource-limiter/memory/lowmem.c
index 1a68b63ab8ad8d16ad96e97f82e08fc005727d8b..e059094cdbd16a7b7408437de4971dc388db7d21 100644 (file)
--- a/src/resource-limiter/memory/lowmem.c
+++ b/src/resource-limiter/memory/lowmem.c
@@ -315,6 +315,11 @@ static int fragmentation_size;
 
 static bool g_bg_reclaim = false;
 
+bool is_bg_reclaim_supported(void)
+{
+       return g_bg_reclaim;
+}
+
 const char *lowmem_convert_cgroup_type_to_str(int type)
 {
        static const char *type_table[] =

diff --git a/src/resource-limiter/memory/lowmem.h b/src/resource-limiter/memory/lowmem.h
index 8fcf313be3c38e8bdabfb2066ea8efb4591ae444..a3a8e94a5c4f57cc44e98f541faeeb003df8fa85 100644 (file)
--- a/src/resource-limiter/memory/lowmem.h
+++ b/src/resource-limiter/memory/lowmem.h
@@ -139,6 +139,7 @@ int lowmem_queue_new_request(unsigned int flags,
                void (*callback) (struct lowmem_control *));
 void lowmem_set_oom_popup(bool popup);
 int lowmem_get_num_max_victims();
+bool is_bg_reclaim_supported(void);
 
 #ifdef __cplusplus
 }