linux-kernel - Re: [PATCH tip/core/rcu 21/48] remove all rcu head initializations, except on

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Date:	Tue, 04 May 2010 15:27:03 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	James Morris <jmorris@...ei.org>,
	Eric Paris <eparis@...isplace.org>
Subject: Re: [PATCH tip/core/rcu 21/48] remove all rcu head
 initializations, except on_stack initializations

On Tue, 2010-05-04 at 13:19 -0700, Paul E. McKenney wrote:
> From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> 
> Remove all rcu head inits. We don't care about the RCU head state before passing
> it to call_rcu() anyway. Only leave the "on_stack" variants so debugobjects can
> keep track of objects on stack.

Please document that distinction at the definition of INIT_RCU_HEADS,
otherwise we're sure to see creep.

-- 
Mathematics is the supreme nostalgia of our time.


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