NFS_ASYSCALE
#define NFS_MINASYNC_SCALED (4 * NFS_ASYSCALE)
#define NFS_MAXASYNC_SCALED (NFS_MAXASYNCBIO * NFS_ASYSCALE)
nmp->nm_bioqlen < nmp->nm_maxasync_scaled / NFS_ASYSCALE &&
n += NFS_ASYSCALE * NFS_HZ;
if (n < NFS_ASYSCALE * NFS_HZ * 10)
n = NFS_ASYSCALE * NFS_HZ * 10;