linux-kernel - Re: [PATCH tip/core/rcu 0/3] Miscellaneous fixes for 3.16

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Message-ID: <20140429154616.GG8754@linux.vnet.ibm.com>
Date:	Tue, 29 Apr 2014 08:46:16 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	niv@...ibm.com, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	darren@...art.com, fweisbec@...il.com, oleg@...hat.com, sbw@....edu
Subject: Re: [PATCH tip/core/rcu 0/3] Miscellaneous fixes for 3.16

On Mon, Apr 28, 2014 at 08:23:45PM -0700, Josh Triplett wrote:
> On Mon, Apr 28, 2014 at 04:56:00PM -0700, Paul E. McKenney wrote:
> > Hello!
> > 
> > This series provides miscellaneous fixes:
> > 
> > 1.	Apply ACCESS_ONCE() to unprotected ->gp_flags accesses.
> > 
> > 2.	Fix typo in comment, courtesy of Liu Ping Fan.
> > 
> > 3.	Make RCU CPU stall warnings print grace-period numbers in
> > 	signed format to improve readability of stall-warning output.
> > 
> > 4.	Make cpu_needs_another_gp() take future grace-period needs
> > 	into account.
> > 
> > 5.	Remove unused ->preemptible field from the rcu_data structure,
> > 	courtesty of Iulia Manda.
> > 
> > 6.	Apply ACCESS_ONCE() to unprotected ->jiffies_stall accesses,
> > 	courtesty of Iulia Manda.
> > 
> > 7.	Make callers responsible for grace-period kthread wakeup in
> > 	order to avoid potential silent grace-period stalls.
> > 
> > 8.	Remove "extern" from RCU function declarations, courtesy of
> > 	Iulia Manda.
> > 
> > 9.	Apply ACCESS_ONCE() to additional ->jiffies_stall accesses,
> > 	courtesy of Himangi Saraogi.
> > 
> > 10.	Add event tracing to dyntick_save_progress_counter(), courtesy
> > 	of Andreea-Cristina Bernat.
> > 
> > 11.	Make rcu_init_one() use nr_cpu_ids instead of NR_CPUS for
> > 	data-structure setup limit check, courtesy of Himangi Saraogi.
> > 
> > 12.	Remove redundant kfree_call_rcu() definition by using the
> > 	rcu_state pointer, courtesy of Andreea-Cristina Bernat.
> > 
> > 13.	Merge rcu_sched_force_quiescent_state() definition with
> > 	rcu_force_quiescent_state() by using the rcu_state pointer,
> > 	courtesy of Andreea-Cristina Bernat.
> > 
> > 14.	Document RCU_INIT_POINTER()'s lack of ordering guarantees.
> > 
> > 15.	Automatically bind RCU's grace-period kthreads to timekeeping
> > 	CPU for NO_HZ_FULL builds.
> > 
> > 16.	Make large and small sysidle systems use equivalent state machine.
> > 
> > 17.	Remove duplicate resched_cpu() declaration, courtesy of
> > 	Pranith Kumar.
> > 
> > 18.	Replace deprecated __this_cpu_ptr() uses with raw_cpu_ptr(),
> > 	courtesy of Christoph Lameter.
> > 
> > 19.	Make softirq processing provide a quiescent state only once
> > 	per full pass over all softirqs rather than once per action,
> > 	courtesy of Eric Dumazet.
> 
> For all 19:
> Reviewed-by: Josh Triplett <josh@...htriplett.org>

And thank you for these reviews as well, applied!

							Thanx, Paul

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