linux-kernel - Re: [PATCH 1/4] slub: automatically reserve bytes at the end of slab

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Message-ID: <alpine.DEB.2.00.1103081222380.25214@router.home>
Date:	Tue, 8 Mar 2011 12:24:07 -0600 (CST)
From:	Christoph Lameter <cl@...ux.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
cc:	Ingo Molnar <mingo@...e.hu>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Matt Mackall <mpm@...enic.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/4] slub: automatically reserve bytes at the end of
 slab

On Tue, 1 Mar 2011, Lai Jiangshan wrote:

> So we add a field "reserved" to struct kmem_cache, when a slab
> is allocated, kmem_cache->reserved bytes are automatically reserved
> at the end of the slab for slab's metadata.

The reserved field should be exported via sysfs. Please add the code to
show it in /sys/kernel/slab/<name>

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