linux-kernel - Re: [PATCH 2/3] rcu: Create rcu

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Date:	Thu, 3 Oct 2013 22:00:02 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] rcu: Create rcu_sync infrastructure

On 10/03, Paul E. McKenney wrote:
>
> On Thu, Oct 03, 2013 at 09:33:19PM +0200, Oleg Nesterov wrote:
> > On 10/03, Oleg Nesterov wrote:
> > >
> > > Because I believe this needs another patch ;) see below, didn't test
> > > it yet.
> > > ...
> > >  struct rcu_sync_ops {
> > >  	void (*sync)(void);
> > >  	void (*call)(struct rcu_head *, void (*)(struct rcu_head *));
> > > +#ifdef CONFIG_PROVE_RCU
> > > +	bool (*held)(void);
> >         ^^^^
> > OK, it has to return "int".
>
> I missed this, but the rest looked good.  ;-)

OK thanks ;)

So unless Peter objects I'll write the changelogs (always nontrivial task),
test, and send these 2 patches + "add ops->barr() / rcu_sync_wait_for_cb"
tomorrow.

Oleg.

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