From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <laijs@cn.fujitsu.com>,
mingo@elte.hu, akpm@linux-foundation.org, dipankar@in.ibm.com,
josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com,
tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
eric.dumazet@gmail.com, Alexey Dobriyan <adobriyan@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH] tree/tiny rcu: Add debug RCU head option (v2)
Date: Mon, 22 Mar 2010 08:56:16 -0700 [thread overview]
Message-ID: <20100322155616.GI2517@linux.vnet.ibm.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1003220935370.15360@router.home>
On Mon, Mar 22, 2010 at 09:37:55AM -0500, Christoph Lameter wrote:
> SLAB overloads "struct slab" with the rcu_head. Its not that critical
> there since the metadata allocated for each slab page is larger. SLUB does
> not have such a per slab page metadata structure and limits its metadata
> to what is available in the page struct.
Thank you for the info!
FWIW, Mathieu is now using debug objects, which permits him to keep
rcu_head the same size.
Thanx, Paul
prev parent reply other threads:[~2010-03-22 15:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-19 1:30 [PATCH] tree/tiny rcu: Add debug RCU head option (v2) Mathieu Desnoyers
2010-03-19 2:08 ` Paul E. McKenney
2010-03-19 2:33 ` Mathieu Desnoyers
2010-03-19 4:13 ` Lai Jiangshan
2010-03-19 5:05 ` Paul E. McKenney
2010-03-19 12:59 ` Mathieu Desnoyers
2010-03-19 13:54 ` Mathieu Desnoyers
2010-03-19 12:34 ` Christoph Lameter
2010-03-19 14:44 ` Paul E. McKenney
2010-03-19 16:56 ` Mathieu Desnoyers
2010-03-19 17:11 ` Paul E. McKenney
2010-03-22 14:37 ` Christoph Lameter
2010-03-22 15:56 ` Paul E. McKenney [this message]
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