On 2016-11-03 09:22:28 [-0700], Paul E. McKenney wrote: > On Wed, Nov 02, 2016 at 05:30:02PM +0100, Sebastian Andrzej Siewior wrote: > > RCU_EXPEDITE_BOOT should speed up the boot process by enforcing > > synchronize_rcu_expedited() instead of synchronize_rcu() during the boot > > process. There should be no reason why one does not want this and there > > is no need worry about real time latency at this point. > > Therefore make it default. > > > > Signed-off-by: Sebastian Andrzej Siewior <[email protected]> > > Well, it has been awhile since I removed a Kconfig parameter. > > So why could this be a bad thing? > > 1. Very large systems might see scalability issues with unconditional > expediting at boot. But if we don't try it, we won't know.
You mean we would make the boot process slower for them instead of faster? > 2. People bringing up new hardware might not want quite so many > IPIs. But they can just set rcu_normal to prevent that. I wanted to make things simple and not complicated… > I am therefore queuing it for testiong and review. ;-) Okay thanks. > Thanx, Paul Sebastian
