linux-kernel - Re: [PATCH 00/16] sched/wait: Collapse __wait

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Message-ID: <20131008214300.GY5790@linux.vnet.ibm.com>
Date:	Tue, 8 Oct 2013 14:43:00 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Ingo Molnar <mingo.kernel.org@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/16] sched/wait: Collapse __wait_event macros -v5

On Tue, Oct 08, 2013 at 11:06:07PM +0200, Peter Zijlstra wrote:
> On Tue, Oct 08, 2013 at 01:41:29PM -0700, Paul E. McKenney wrote:
> > On Tue, Oct 08, 2013 at 10:01:55PM +0200, Peter Zijlstra wrote:
> > > On Tue, Oct 08, 2013 at 09:47:18PM +0200, Ingo Molnar wrote:
> > > > To me it would sure look nice to have kernel/rcu/tree.c, 
> > > > kernel/rcu/tiny.c, kernel/rcu/core.c, etc.
> > > > 
> > > > [ ... and we would certainly also break new ground by introducing a
> > > >   "torture.c" file, for the first time in Linux kernel history! ;-) ]
> > > > 
> > > > But it's really your call, this is something you should only do if you are 
> > > > comfortable with it.
> > > 
> > > IFF we're going to restructure rcu; can we save the CPP some work and do
> > > away with rcu*_plugin.h ?
> > 
> > OK, I'll bite...  Where did you want to put the code instead?
> 
> Just about here:
> 
> kernel/rcutree.c:#include "rcutree_plugin.h"
> 
> and save the bother of inclusion.

I would be more likely to break rcutree_plugin.h into pieces (e.g., for
preempt-rcu, RCU_FAST_NOHZ, NOCB, stall warnings, and so on than to merge
it into rcutree.c.

							Thanx, Paul

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