ignore_hole_birth_param.patch

--- a/module/zfs/dmu_traverse.c
+++ b/module/zfs/dmu_traverse.c
@@ -39,6 +39,7 @@
 #include <sys/zfeature.h>

 int32_t zfs_pd_bytes_max = 50 * 1024 * 1024;   /* 50MB */
+int32_t ignore_hole_birth = 0;

 typedef struct prefetch_data {
        kmutex_t pd_mtx;
@@ -251,7 +252,7 @@ traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
                 *
                 * Note that the meta-dnode cannot be reallocated.
                 */
-               if ((!td->td_realloc_possible ||
+               if (!ignore_hole_birth && (!td->td_realloc_possible ||
                        zb->zb_object == DMU_META_DNODE_OBJECT) &&
                        td->td_hole_birth_enabled_txg <= td->td_min_txg)
                        return (0);
@@ -727,4 +728,7 @@ EXPORT_SYMBOL(traverse_pool);

 module_param(zfs_pd_bytes_max, int, 0644);
 MODULE_PARM_DESC(zfs_pd_bytes_max, "Max number of bytes to prefetch");
+
+module_param(ignore_hole_birth, int, 0644);
+MODULE_PARM_DESC(ignore_hole_birth, "Ignore hole_birth txg for send");
 #endif