linux-kernel - Re: [PATCH] mm, slub: do not add duplicate sysfs

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Message-ID: <alpine.DEB.2.11.1408271023130.17080@gentwo.org>
Date:	Wed, 27 Aug 2014 10:25:08 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	WANG Chao <chaowang@...hat.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	"open list:SLAB ALLOCATOR" <linux-mm@...ck.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm, slub: do not add duplicate sysfs

On Wed, 27 Aug 2014, WANG Chao wrote:

> Mergeable slab can be changed to unmergeable after tuning its sysfs
> interface, for example echo 1 > trace. But the sysfs kobject with the unique
> name will be still there.

Hmmm... Merging should be switched off if any debugging features are
enabled. Maybe we need to disable modifying debug options for an active
cache? This could cause other issues as well since the debug options will
then apply to multiple caches.

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