Dynamic Reconfiguration & Solaris 10

I tried DR yestarday on Solaris 10 - and wow, I'm impressed. With older Solaris releases you couldn't unconfigure&detach CPU/MEM board on which kernel resided - usually it meant lowest CPU/MEM board in a system. I tried to unconfigure such a board on Solaris 10 - and wow! it works!
However there's an issue - system freezes for a moment (2-4 minutes) and then continues to run. It's not a case when you unconfigure a board without kernel on it. It's much better then in previous releases of Solaris.

bash-3.00# prtconf | grep Memory
Memory size: 32768 Megabytes
bash-3.00# psrinfo |wc -l
      16
bash-3.00#

bash-3.00# cfgadm -alv|grep -i permane
N0.SB2::memory                 connected    configured   ok         base address 0x0, 16777216 KBytes total, 1447408 KBytes permanent

bash-3.00# cfgadm -c unconfigure N0.SB0
bash-3.00# prtconf | grep Memory
Memory size: 16384 Megabytes
bash-3.00# psrinfo |wc -l
       8

bash-3.00# cfgadm -c configure N0.SB0

bash-3.00# cfgadm -c unconfigure N0.SB2
System may be temporarily suspended, proceed (yes/no)? yes

bash-3.00# prtconf | grep Memory
Memory size: 16384 Megabytes
bash-3.00# psrinfo |wc -l
       8
bash-3.00#
bash-3.00# cfgadm -alv|grep -i permane
N0.SB0::memory                 connected    configured   ok         base address 0x0, 16777216 KBytes total, 1447408 KBytes permanent
bash-3.00#