diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 5d21a9b6..25589bf2 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -189,8 +189,8 @@ typedef struct mm_rx_buffer
 
 	uint8_t			iv_intr;
 
-	sem_t			lock;
-//        spinlock_t              lock;
+//	sem_t			lock;
+        spinlock_t              lock;
 
 //	uint32_t		timestamp[MMNIF_RX_QUEUELEN];
 //	uint32_t		bitmap[MMNIF_RX_QUEUELEN];
diff --git a/include/metalsvm/config.h b/include/metalsvm/config.h
index 15a222af..f70fdd4c 100644
--- a/include/metalsvm/config.h
+++ b/include/metalsvm/config.h
@@ -35,7 +35,7 @@ extern "C" {
 #define PAGE_SHIFT		12
 #define CACHE_LINE		64
 #define MAILBOX_SIZE		8
-#define TIMER_FREQ		1000	/* in HZ */
+#define TIMER_FREQ		100	/* in HZ */
 #define CLOCK_TICK_RATE		1193182	/* 8254 chip's internal oscillator frequency */
 #define INT_SYSCALL		0x80
 #define KERNEL_SPACE		(1*1024*1024*1024)