linux-kernel - Re: [PATCH tip/core/rcu 0/10] Expedited-grace-period changes for 4.5

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Message-ID: <20151206022718.GO28602@linux.vnet.ibm.com>
Date:	Sat, 5 Dec 2015 18:27:18 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	tglx@...utronix.de, peterz@...radead.org, 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 tip/core/rcu 0/10] Expedited-grace-period changes for 4.5

On Fri, Dec 04, 2015 at 05:06:42PM -0800, Josh Triplett wrote:
> On Fri, Dec 04, 2015 at 03:58:51PM -0800, Paul E. McKenney wrote:
> > Hello!
> > 
> > This series contains follow-on cleanup changes to RCU's expedited
> > grace-period functionality.  The patches in this series are as follows:
> > 
> > 1.	Short-circuit synchronize_sched_expedited() if there is only one CPU.
> > 
> > 2.	Update comment to clarify the role of ->expmaskinitnext.
> > 
> > 3.	Separate concerns by moving smp_mb() from rcu_seq_snap() to
> > 	rcu_exp_gp_seq_snap().
> > 
> > 4.	Safe a few lines of code by inverting the sense of
> > 	sync_rcu_exp_select_cpus() "if" statement.
> > 
> > 5.	Reduce expedited GP memory contention via per-CPU variables.
> > 
> > 6.	Get rid of (some) empty stall-warning messages by resolving
> > 	stall-warning ties.
> > 
> > 7.	Add more diagnostics to expedited stall warning messages.
> > 
> > 8.	Add rcu_normal kernel parameter to suppress expediting for
> > 	the benefit of aggressive real-time systems.
> > 
> > 9-10.	Allow expedited grace periods to be disabled just before init
> > 	is spawned, allowing them to speed up boot without interfering
> > 	with run-time real-time workloads.
> 
> This cover letter doesn't seem to match the patch series that shows up
> as replies to it.  The patch series has 13 patches, numbered 01/13 to
> 13/13.  You sent a separate cover letter, not part of this thread, that
> seems to match up.

Indeed, not one of my better patch submissions.  :-/

							Thanx, Paul

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