linux-kernel - Re: [PATCH RFC tip/core/rcu 2/5] rcu: Short-circuit normal GPs via expedited GPs

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Message-ID: <20150706145251.GK19282@twins.programming.kicks-ass.net>
Date:	Mon, 6 Jul 2015 16:52:51 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, rostedt@...dmis.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH RFC tip/core/rcu 2/5] rcu: Short-circuit normal GPs via
 expedited GPs

On Thu, Jul 02, 2015 at 12:35:45PM -0700, Paul E. McKenney wrote:
> OK, how about this, then?

> rcu: Rename RCU_GP_DONE_FQS to RCU_GP_DOING_FQS
> 
> The grace-period kthread sleeps waiting to do a force-quiescent-state
> scan, and when awakened sets rsp->gp_state to RCU_GP_DONE_FQS.
> However, this is confusing because the kthread has not done the
> force-quiescent-state, but is instead just starting to do it.  This commit
> therefore renames RCU_GP_DONE_FQS to RCU_GP_DOING_FQS in order to make
> things a bit easier on reviewers.
> 
> Reported-by: Peter Zijlstra <peterz@...radead.org>
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Much better, thanks! :-)
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