I thought "nointr" was the default because it is safest.

Jeff Layton wrote:
> The current string-based mount options default to "nointr" mounts. This
> is consistent with the current behavior of the struct-based mount
> options for NFSv2/3, but inconsistent with v4.
> 
> I've just sent a nfs-utils patch to make the default be "intr" for all
> NFS flavors. This patch makes the default the same when using
> string-based mount options.
> 
> Signed-off-by: Jeff Layton <jlayton@redhat.com>
> 
> diff --git a/fs/nfs/super.c b/fs/nfs/super.c
> index b2a851c..55f9b8b 100644
> --- a/fs/nfs/super.c
> +++ b/fs/nfs/super.c
> @@ -1122,7 +1122,9 @@ static int nfs_validate_mount_data(struct nfs_mount_data **options,
>  		char *c;
>  		int status;
>  		struct nfs_parsed_mount_data args = {
> -			.flags		= (NFS_MOUNT_VER3 | NFS_MOUNT_TCP),
> +			.flags		= (NFS_MOUNT_INTR |
> +					   NFS_MOUNT_VER3 |
> +					   NFS_MOUNT_TCP),
>  			.rsize		= NFS_MAX_FILE_IO_SIZE,
>  			.wsize		= NFS_MAX_FILE_IO_SIZE,
>  			.timeo		= 600,
> @@ -1608,6 +1610,7 @@ static int nfs4_validate_mount_data(struct nfs4_mount_data **options,
>  	default: {
>  		unsigned int len;
>  		struct nfs_parsed_mount_data args = {
> +			.flags		= NFS4_MOUNT_INTR,
>  			.rsize		= NFS_MAX_FILE_IO_SIZE,
>  			.wsize		= NFS_MAX_FILE_IO_SIZE,
>  			.timeo		= 600,
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