1 files changed, 23 insertions, 15 deletions

diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 2c6a6bd08322..507056d22205 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -13,18 +13,26 @@
 						 * whether IO subsystem is idle
 						 * or not
 						 */
-#define GC_THREAD_MIN_SLEEP_TIME	30000	/* milliseconds */
-#define GC_THREAD_MAX_SLEEP_TIME	60000
-#define GC_THREAD_NOGC_SLEEP_TIME	300000	/* wait 5 min */
+#define DEF_GC_THREAD_MIN_SLEEP_TIME	30000	/* milliseconds */
+#define DEF_GC_THREAD_MAX_SLEEP_TIME	60000
+#define DEF_GC_THREAD_NOGC_SLEEP_TIME	300000	/* wait 5 min */
 #define LIMIT_INVALID_BLOCK	40 /* percentage over total user space */
 #define LIMIT_FREE_BLOCK	40 /* percentage over invalid + free space */
 
 /* Search max. number of dirty segments to select a victim segment */
-#define MAX_VICTIM_SEARCH	20
+#define MAX_VICTIM_SEARCH 4096 /* covers 8GB */
 
 struct f2fs_gc_kthread {
 	struct task_struct *f2fs_gc_task;
 	wait_queue_head_t gc_wait_queue_head;
+
+	/* for gc sleep time */
+	unsigned int min_sleep_time;
+	unsigned int max_sleep_time;
+	unsigned int no_gc_sleep_time;
+
+	/* for changing gc mode */
+	unsigned int gc_idle;
 };
 
 struct inode_entry {
@@ -56,25 +64,25 @@ static inline block_t limit_free_user_blocks(struct f2fs_sb_info *sbi)
 	return (long)(reclaimable_user_blocks * LIMIT_FREE_BLOCK) / 100;
 }
 
-static inline long increase_sleep_time(long wait)
+static inline long increase_sleep_time(struct f2fs_gc_kthread *gc_th, long wait)
 {
-	if (wait == GC_THREAD_NOGC_SLEEP_TIME)
+	if (wait == gc_th->no_gc_sleep_time)
 		return wait;
 
-	wait += GC_THREAD_MIN_SLEEP_TIME;
-	if (wait > GC_THREAD_MAX_SLEEP_TIME)
-		wait = GC_THREAD_MAX_SLEEP_TIME;
+	wait += gc_th->min_sleep_time;
+	if (wait > gc_th->max_sleep_time)
+		wait = gc_th->max_sleep_time;
 	return wait;
 }
 
-static inline long decrease_sleep_time(long wait)
+static inline long decrease_sleep_time(struct f2fs_gc_kthread *gc_th, long wait)
 {
-	if (wait == GC_THREAD_NOGC_SLEEP_TIME)
-		wait = GC_THREAD_MAX_SLEEP_TIME;
+	if (wait == gc_th->no_gc_sleep_time)
+		wait = gc_th->max_sleep_time;
 
-	wait -= GC_THREAD_MIN_SLEEP_TIME;
-	if (wait <= GC_THREAD_MIN_SLEEP_TIME)
-		wait = GC_THREAD_MIN_SLEEP_TIME;
+	wait -= gc_th->min_sleep_time;
+	if (wait <= gc_th->min_sleep_time)
+		wait = gc_th->min_sleep_time;
 	return wait;
 }