diff --git a/mars_trans_logger.c b/mars_trans_logger.c
index 259289f1..76727dd0 100644
--- a/mars_trans_logger.c
+++ b/mars_trans_logger.c
@@ -66,9 +66,6 @@ EXPORT_SYMBOL_GPL(trans_logger_do_crc);
 int trans_logger_mem_usage; // in KB
 EXPORT_SYMBOL_GPL(trans_logger_mem_usage);
 
-int trans_logger_max_depth = 128;
-EXPORT_SYMBOL_GPL(trans_logger_max_depth);
-
 struct writeback_group global_writeback = {
 	.lock = __RW_LOCK_UNLOCKED(global_writeback.lock),
 	.group_anchor = LIST_HEAD_INIT(global_writeback.group_anchor),
@@ -684,8 +681,7 @@ int _write_ref_get(struct trans_logger_output *output, struct trans_logger_mref_
 	// delay in case of too many master shadows / memory shortage
 	wait_event_interruptible_timeout(brick->caller_event,
 					 !brick->delay_callers &&
-					 (brick_global_memlimit < 1024 || atomic64_read(&global_mshadow_used) / 1024 < brick_global_memlimit) &&
-					 (trans_logger_max_depth <= 0 || atomic_read(&brick->q_phase[0].q_queued) < trans_logger_max_depth),
+					 (brick_global_memlimit < 1024 || atomic64_read(&global_mshadow_used) / 1024 < brick_global_memlimit),
 					 HZ / 2);
 #endif
 
diff --git a/mars_trans_logger.h b/mars_trans_logger.h
index e1343dc0..cc7ee371 100644
--- a/mars_trans_logger.h
+++ b/mars_trans_logger.h
@@ -25,7 +25,6 @@
 extern int trans_logger_completion_semantics;
 extern int trans_logger_do_crc;
 extern int trans_logger_mem_usage; // in KB
-extern int trans_logger_max_depth;
 extern atomic_t   global_mshadow_count;
 extern atomic64_t global_mshadow_used;
 
diff --git a/sy_old/mars_proc.c b/sy_old/mars_proc.c
index d21f9760..750bbc69 100644
--- a/sy_old/mars_proc.c
+++ b/sy_old/mars_proc.c
@@ -210,7 +210,6 @@ ctl_table mars_table[] = {
 	INT_ENTRY("syslog_max_class",     brick_say_syslog_max,   0600),
 	INT_ENTRY("delay_say_on_overflow",delay_say_on_overflow,  0600),
 	INT_ENTRY("mapfree_period_sec",   mapfree_period_sec,     0600),
-	INT_ENTRY("logger_max_depth",     trans_logger_max_depth, 0600),
 	INT_ENTRY("mem_limit_percent",    mars_mem_percent,       0600),
 	INT_ENTRY("logger_mem_used_kb",   trans_logger_mem_usage, 0400),
 	INT_ENTRY("mem_used_raw_kb",      brick_global_block_used,0400),