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

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Message-Id: <1198289982.4411.2.camel@cinder.waste.org>
Date:	Fri, 21 Dec 2007 20:19:42 -0600
From:	Matt Mackall <mpm@...enic.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 Sat, 2007-12-22 at 01:28 +0100, 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.

Might as well mention that SLOB also doesn't provide this functionality,
nor would it make any sense for it to try (because there are no
slab-like objects to report about).

-- 
Mathematics is the supreme nostalgia of our time.

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