What a strange prctl output for zone.cpu-cap for the global zone...

Hello,
Please, take a look:

$ cat /etc/release
                   Oracle Solaris 10 8/11 s10s_u10wos_17b SPARC
  Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved.
                            Assembled 23 August 2011

$ zonename
global

$ uname -a
SunOS x.domain.com 5.10 Generic_147440-08 sun4u sparc SUNW,Sun-Fire-V490

$ prctl -n zone.cpu-cap -i zone global
zone: 0: global
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
zone.cpu-cap
        system          4.29G     inf   deny

$ psrinfo
0       on-line   since 12/28/2011 14:11:34
1       on-line   since 12/28/2011 14:11:34
2       on-line   since 12/28/2011 14:11:34
3       on-line   since 12/28/2011 14:11:32
16      on-line   since 12/28/2011 14:11:34
17      on-line   since 12/28/2011 14:11:34
18      on-line   since 12/28/2011 14:11:34
19      on-line   since 12/28/2011 14:11:34

Is that right?

Thanks in advance,
Carlos.