diff --git a/include/sys/zvol_impl.h b/include/sys/zvol_impl.h
index b06018aa7..038d4cb48 100644
--- a/include/sys/zvol_impl.h
+++ b/include/sys/zvol_impl.h
@@ -93,8 +93,9 @@ extern struct hlist_head *zvol_htable;
 #define	ZVOL_HT_HEAD(hash)	(&zvol_htable[(hash) & (ZVOL_HT_SIZE-1)])
 extern zil_replay_func_t *const zvol_replay_vector[TX_MAX_TYPE];
 
-extern unsigned int zvol_volmode;
 extern unsigned int zvol_inhibit_dev;
+extern unsigned int zvol_prefetch_bytes;
+extern unsigned int zvol_volmode;
 extern unsigned int zvol_threads;
 extern unsigned int zvol_num_taskqs;
 extern unsigned int zvol_request_sync;
diff --git a/module/os/freebsd/zfs/zvol_os.c b/module/os/freebsd/zfs/zvol_os.c
index 876e0855f..4dec6289b 100644
--- a/module/os/freebsd/zfs/zvol_os.c
+++ b/module/os/freebsd/zfs/zvol_os.c
@@ -1369,7 +1369,7 @@ zvol_os_create_minor(const char *name)
 	objset_t *os;
 	dmu_object_info_t *doi;
 	uint64_t volsize;
-	uint64_t volmode, hash;
+	uint64_t volmode, hash, len;
 	int error;
 	bool replayed_zil = B_FALSE;
 
@@ -1480,7 +1480,12 @@ zvol_os_create_minor(const char *name)
 		zil_close(zv->zv_zilog);
 	zv->zv_zilog = NULL;
 
-	/* TODO: prefetch for geom tasting */
+	len = MIN(zvol_prefetch_bytes, SPA_MAXBLOCKSIZE);
+	if (len > 0) {
+		dmu_prefetch(os, ZVOL_OBJ, 0, 0, len, ZIO_PRIORITY_ASYNC_READ);
+		dmu_prefetch(os, ZVOL_OBJ, 0, volsize - len, len,
+		    ZIO_PRIORITY_ASYNC_READ);
+	}
 
 	zv->zv_objset = NULL;
 out_dmu_objset_disown:
diff --git a/module/os/linux/zfs/zvol_os.c b/module/os/linux/zfs/zvol_os.c
index a4bd4bd2a..6a855e706 100644
--- a/module/os/linux/zfs/zvol_os.c
+++ b/module/os/linux/zfs/zvol_os.c
@@ -51,7 +51,6 @@ static void zvol_request_impl(zvol_state_t *zv, struct bio *bio,
     struct request *rq, boolean_t force_sync);
 
 static unsigned int zvol_major = ZVOL_MAJOR;
-static unsigned int zvol_prefetch_bytes = (128 * 1024);
 static unsigned long zvol_max_discard_blocks = 16384;
 
 #ifndef HAVE_BLKDEV_GET_ERESTARTSYS
@@ -1796,9 +1795,6 @@ MODULE_PARM_DESC(zvol_major, "Major number for zvol device");
 module_param(zvol_max_discard_blocks, ulong, 0444);
 MODULE_PARM_DESC(zvol_max_discard_blocks, "Max number of blocks to discard");
 
-module_param(zvol_prefetch_bytes, uint, 0644);
-MODULE_PARM_DESC(zvol_prefetch_bytes, "Prefetch N bytes at zvol start+end");
-
 module_param(zvol_volmode, uint, 0644);
 MODULE_PARM_DESC(zvol_volmode, "Default volmode property value");
 
diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index 81fff745b..1b640ee3f 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -89,6 +89,7 @@
 #include <sys/zvol_impl.h>
 
 unsigned int zvol_inhibit_dev = 0;
+unsigned int zvol_prefetch_bytes = (128 * 1024);
 unsigned int zvol_volmode = ZFS_VOLMODE_GEOM;
 unsigned int zvol_threads = 0;
 unsigned int zvol_num_taskqs = 0;
@@ -2156,6 +2157,8 @@ zvol_fini_impl(void)
 
 ZFS_MODULE_PARAM(zfs_vol, zvol_, inhibit_dev, UINT, ZMOD_RW,
 	"Do not create zvol device nodes");
+ZFS_MODULE_PARAM(zfs_vol, zvol_, prefetch_bytes, UINT, ZMOD_RW,
+	"Prefetch N bytes at zvol start+end");
 ZFS_MODULE_PARAM(zfs_vol, zvol_, threads, UINT, ZMOD_RW,
 	"Number of threads for I/O requests. Set to 0 to use all active CPUs");
 ZFS_MODULE_PARAM(zfs_vol, zvol_, num_taskqs, UINT, ZMOD_RW,