linux-kernel - Re: Major regression on hackbench with SLUB (more numbers)

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Message-ID: <476C5B66.9030209@redhat.com>
Date:	Fri, 21 Dec 2007 19:33:42 -0500
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Ingo Molnar <mingo@...e.hu>, Christoph Lameter <clameter@....com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Major regression on hackbench with SLUB (more numbers)

On 12/21/2007 07:28 PM, Andi Kleen wrote:
> Ingo Molnar <mingo@...e.hu> writes:
> 
>> Christoph, /proc/slabinfo is an _ABI_. You HAVE to provide it. slabtop 
>> relies on it, people use it every day to monitor memory consumption.
> 
> It's definitely not a stable ABI. slabtop tends to exit without any
> error message on any slabinfo version number increase and I've seen
> that happen several times in not so old kernels.
> 
> Requiring just another slabtop update isn't really a big deal.
> 
> Also it's not that it's a critical functionality like udev.
> 

There's also Documentation/vm/slabinfo.c, which really belongs in
some kind of 'kernel utilities' package. Since it's so intimately
tied to kernel version I don't think it belongs in util-linux.

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