we have implement GPFS 3.5.0.10 with 4 nodes cluster AIX 6.1 TL8 and they VIO clients , after that we noticed a big delay while we execute any command like mmgetstate -a will take about 2.5 minutes .
time mmgetstate -a Node number Node name GPFS state
------------------------------------------
1 A active
2 B active
3 C active
4 D active
real 1m31.688s
user 0m0.375s
sys 0m0.174s