linux-kernel - Re: [PATCH 2/2] mm/slub: disable merging after enabling debug in runtime

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Message-ID: <alpine.DEB.2.11.1507141616440.12219@east.gentwo.org>
Date:	Tue, 14 Jul 2015 16:18:38 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Konstantin Khlebnikov <koct9i@...il.com>
cc:	Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mm/slub: disable merging after enabling debug in
 runtime


On Tue, 14 Jul 2015, Konstantin Khlebnikov wrote:
> > What breaks?
>
> The same commands from first patch:
>
> # echo 1 | tee /sys/kernel/slab/*/sanity_checks
> # modprobe configfs
>
> loading configfs now fails (without crashing kernel though) because of
> "sysfs: cannot create duplicate filename '/kernel/slab/:t-0000096'"

Hrm.... Bad. Maybe drop the checks for the debug options that can be
configured when merging slabs? They do not influence the object layout
per definition.
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