Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760318AbXLUW6Q (ORCPT ); Fri, 21 Dec 2007 17:58:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757796AbXLUW6D (ORCPT ); Fri, 21 Dec 2007 17:58:03 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:45978 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757018AbXLUW6B (ORCPT ); Fri, 21 Dec 2007 17:58:01 -0500 Date: Fri, 21 Dec 2007 23:54:13 +0100 From: Ingo Molnar To: Christoph Lameter Cc: Peter Zijlstra , Linus Torvalds , Steven Rostedt , LKML , Andrew Morton , Christoph Hellwig , "Rafael J. Wysocki" Subject: Re: Major regression on hackbench with SLUB (more numbers) Message-ID: <20071221225413.GA26189@elte.hu> References: <20071211143336.GA17866@elte.hu> <20071221120908.GA15926@elte.hu> <1198275391.30889.3.camel@lappy> <1198275453.30889.4.camel@lappy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1706 Lines: 37 * Christoph Lameter wrote: > On Fri, 21 Dec 2007, Peter Zijlstra wrote: > > > BTW, does /proc/slabinfo exist again? I thought we set that as a > > requirement for SLUB to be the default and a full replacement for > > SLAB. > > Well the information that would be exposed in /proc/slabinfo would > only be faked up stuff from SLUB. The queues that are described in > /proc/slabinfo do not exist f.e. (tunables do not make sense) and > there are more details available via /sys/kernel/slab. Christoph, /proc/slabinfo is an _ABI_. You HAVE to provide it. slabtop relies on it, people use it every day to monitor memory consumption. I'm really getting worried that you are apparently incapable of grasping such _SIMPLE_ concepts. Who the heck cares whether you put in zeros or whatever else in some of the fields? People use it to know how many objects are allocated and sure SLUB knows that count, sheesh. How on earth can you come up with a lame excuse like that? You dont like the 'SLAB' portion of the name perhaps? Is it NIH again? Really, if your behavior is representative of how our SLAB allocator will be maintained in the future then i'm very, very worried :-( You ignore and downplay clear-cut regressions, you insult and attack testers, you are incredibly stupid about user ABIs (or pretend to be so) and you distort and mislead all the way. What will you be able to do in the much less clear-cut cases?? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/