[Linux-ha-dev] default blocking/nonblocking behavior for send() in IPC

[Guochun Shi]

Hi,

The default behavior for send function in IPC --socket_send() in ipcsocket.c --now is blocking. 
According to alan, what he had in mind is the default should be non-blocking. 
If we change the behavior to non-blocking, 
some of subsystems/ha plugin in evms who are expecting blocking behavior will be affected. We can either set
the channel to blocking after we creates it or handler non-blocking accordingly.

I would like to know what other subsystems are affected. Also since I prefer to the default 
to be blocking (a). tcp does that (b) it will not break current subsystems/ha plugin in evms), 
so I would love comments on that too :)

thanks
-Guochun