[ovs-dev] [branch-2.3] ofproto-dpif-upcall: Make handler always call poll_block.

[Ben Pfaff]

On Mon, Dec 29, 2014 at 04:06:55PM -0800, Alex Wang wrote:
> This commit makes handler threads always call poll_block() at
> the end of each handling cycle.  If there are upcalls received
> in the current cycle, the handler will register to wake up
> immediately.  Otherwise, it will wait on both the netlink
> socket and the exit latch.
> 
> Calling poll_block() at every handling cycle makes sure that
> coverage counter stats are always timely attributed, and that
> the execution of ovsrcu-postponed events is not held by any
> busy handler thread.
> 
> Signed-off-by: Alex Wang <alexw at nicira.com>

Acked-by: Ben Pfaff <blp at nicira.com>