Re: [SSI-users] pid namespace

[Aneesh K. KV <ane...@di...>]

stevie mckibbin wrote:

>i notice when a process migrates it takes it's pid
>with it. what happens if this id is already in use? or
>when the pid is allocated initially is it taken from a
>clusterwide namespace?
>stevie
>
It cannot be used by other nodes. With clusterwide pid name space each 
node is allocated a pid space. Any process created on that node will 
carry pid only in that space. pid of process on each  node also contain 
the node number embedded in it. Looking at pid we can also say which is 
the origin node of this process. ( I don't have the code in front of me 
right now. I guess it is ssi_get_pid(). and it get NODESHIFT bits for 
encoding the node number  )

-aneesh




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