linux-oracle-hyper threading

[kshathrya]

hi all,
does red hat linux 9 support hyperthreaded p4 systems?
if i install oracle 9i on a rehat linux 9 hyperthreaded system, can i see
that as 2 virtual processor from oracle's perspective?
can i use oraclel's parallel features with these virtual processor?

tnx,
ks