linux-kernel - Re: [PATCH v2] mm/slab: Improve performance of gathering slabinfo stats

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Message-ID: <alpine.DEB.2.20.1608050919410.27772@east.gentwo.org>
Date:	Fri, 5 Aug 2016 09:21:56 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <js1304@...il.com>
cc:	Aruna Ramakrishna <aruna.ramakrishna@...cle.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mike Kravetz <mike.kravetz@...cle.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2] mm/slab: Improve performance of gathering slabinfo
 stats

On Fri, 5 Aug 2016, Joonsoo Kim wrote:

> If above my comments are fixed, all counting would be done with
> holding a lock. So, atomic definition isn't needed for the SLAB.

Ditto for slub. struct kmem_cache_node is alrady defined in mm/slab.h.
Thus it is a common definition already and can be used by both.

Making nr_slabs and total_objects unsigned long would be great.