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

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Message-ID: <p731w9ffu8c.fsf@bingen.suse.de>
Date:	Sat, 22 Dec 2007 01:28:35 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	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)

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.

-Andi

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