linux-kernel - Re: [RFC][PATCH] slub: Check for page NULL before doing the node

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Message-ID: <0000013c4e1da430-0d8efce2-01b6-4862-b7b1-2ccd6503fc17-000000@email.amazonses.com>
Date:	Fri, 18 Jan 2013 14:43:51 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	RT <linux-rt-users@...r.kernel.org>,
	Clark Williams <clark@...hat.com>,
	John Kacur <jkacur@...il.com>,
	"Luis Claudio R. Goncalves" <lgoncalv@...hat.com>
Subject: Re: [RFC][PATCH] slub: Check for page NULL before doing the node_match
 check

On Thu, 17 Jan 2013, Steven Rostedt wrote:

> Because there's also nothing to keep page related to object either, we
> may just need to do:

Adding the NULL check is satisfactory I think. The TID check guarantees
that nothing happened in between and the call the __slab_alloc can do the
same as the fastpath if it mistakenly goes to the slowpath.

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