Wait on multiple wait queues

["pgssgp@xxxxxxxxx" <pgssgp@xxxxxxxxx>]

Hi all,
   I am just curious to understand how poll,epoll,select works. After 
going through kernel source code.This is
what I understand,Please correct me if I am wrong :
A task can be added to multiple wait queues  and later a wake up on any 
of wait queue will wake up the task.This is done do_select function 
which first sets the task state to TASK_INTERRUPTIBLE and then call each 
filp->poll function
which  inturn calls poll_wait  (which adds the task in a waitqueue )
---pgssgp




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