diff --git a/mars_aio.h b/mars_aio.h
index 9e08326c..657b3666 100644
--- a/mars_aio.h
+++ b/mars_aio.h
@@ -62,7 +62,7 @@ struct aio_output {
 	struct aio_threadinfo tinfo[3];
 	aio_context_t ctxp;
 	wait_queue_head_t fdsync_event;
-	volatile bool fdsync_active;
+	bool fdsync_active;
 	// statistics
 	atomic_t total_read_count;
 	atomic_t total_write_count;
diff --git a/mars_copy.h b/mars_copy.h
index 5608f9de..0cd72087 100644
--- a/mars_copy.h
+++ b/mars_copy.h
@@ -42,8 +42,8 @@ struct copy_mref_aspect {
 struct copy_brick {
 	MARS_BRICK(copy);
 	// parameters
-	volatile loff_t copy_start;
-	volatile loff_t copy_end; // stop working if == 0
+	loff_t copy_start;
+	loff_t copy_end; // stop working if == 0
 	int io_prio;
 	int append_mode; // 1 = passively, 2 = actively
 	bool verify_mode;
@@ -55,8 +55,8 @@ struct copy_brick {
 	bool low_dirty;
 	bool is_aborting;
 	// internal
-	volatile bool trigger;
-	volatile unsigned long clash;
+	bool trigger;
+	unsigned long clash;
 	atomic_t io_flight;
 	atomic_t copy_flight;
 	long long last_jiffies;
diff --git a/sy_old/strategy.h b/sy_old/strategy.h
index ca9ffcc2..19af47bb 100644
--- a/sy_old/strategy.h
+++ b/sy_old/strategy.h
@@ -56,7 +56,7 @@ struct mars_global {
 	loff_t total_space;
 	loff_t remaining_space;
 	int global_version;
-	volatile bool main_trigger;
+	bool main_trigger;
 	bool exhausted;
 };