[RFC,PATCH 0/2] do_wait() wakeup optimization

[Oleg Nesterov]

Now that we have struct wait_opts, it is easy to solve the problems with
unnecessary wakeups from __wake_up_parent(). See the previous discussion

	"+ do_wait-wakeup-optimization.patch added to -mm tree"
	http://marc.info/?t=122729873300001

However, this complicates the code a bit and adds bytes 112 to compiled
code.

Ratan, Roland, do you think this optimisation is worthwhile?

Oleg.

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