[CentOS] microcode_ctl

i'm running on vmware system and HP proliant DL360 G5 servers 
 
 
on wmware, on boot i have the following message:
 
-----------------------------
Applying Intel Microcode update: don't know to make device "cpu/microcode"
[OK]
-----------------------------
 
and on a HP proliant DL360 G5 server , on boot i have too the following
message:
 
-----------------------------
Applying Intel Microcode update: don't know to make device "cpu/microcode"
etc/rc3.d/S00microcode_ctl: microcode device /dev/cpu/microcode doesn't
exist?
[OK]
-----------------------------
 
 
Why this message, warning ?
 
 
Denis MACHARD
 <mailto:d at enst-bretagne.fr>  
 
 
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