Hi,

I was going through the boot up  code and came across the following masks .

• CPU online mask : The number of CPU's available for getting scheduled on
  
• CPU active mask : The number of CPU's on which some task can be migrated to (not very clear as to the difference between online and active)
  
• CPU present mask : Total number of CPU's limited by max cpu's variable
  
• CPU possible mask : Total number of possible CPU's in the system
  

But i am not sure if my understanding is correct and wanted to validate the same .

Thanks,

--Vignesh

http://vigneshradhakrishnan.blogspot.com/