diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/crypto_os.c b/sys/contrib/openzfs/module/os/freebsd/zfs/crypto_os.c
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/crypto_os.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/crypto_os.c
@@ -172,11 +172,13 @@
 			break;
 		mtx_lock(&session->fs_lock);
 		while (session->fs_done == false)
-			msleep(crp, &session->fs_lock, PRIBIO,
-			    "zfs_crypto", hz/5);
+			msleep(crp, &session->fs_lock, 0,
+			    "zfs_crypto", 0);
 		mtx_unlock(&session->fs_lock);
 
-		if (crp->crp_etype != EAGAIN) {
+		if (crp->crp_etype == ENOMEM) {
+			pause("zcrnomem", 1);
+		} if (crp->crp_etype != EAGAIN) {
 			error = crp->crp_etype;
 			break;
 		}