Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754215AbXLWBBT (ORCPT ); Sat, 22 Dec 2007 20:01:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754176AbXLWBBL (ORCPT ); Sat, 22 Dec 2007 20:01:11 -0500 Received: from ms-smtp-04.nyroc.rr.com ([24.24.2.58]:61259 "EHLO ms-smtp-04.nyroc.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754219AbXLWBBJ (ORCPT ); Sat, 22 Dec 2007 20:01:09 -0500 Date: Sat, 22 Dec 2007 19:59:47 -0500 (EST) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Willy Tarreau cc: Linus Torvalds , Theodore Tso , Ingo Molnar , Andi Kleen , Christoph Lameter , Peter Zijlstra , LKML , Andrew Morton , Christoph Hellwig , "Rafael J. Wysocki" Subject: Re: Major regression on hackbench with SLUB (more numbers) In-Reply-To: <20071222221050.GA20753@1wt.eu> Message-ID: References: <1198275391.30889.3.camel@lappy> <1198275453.30889.4.camel@lappy> <20071221225413.GA26189@elte.hu> <20071222100326.GF26157@elte.hu> <20071222192550.GD28891@thunk.org> <20071222221050.GA20753@1wt.eu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1452 Lines: 43 [/me sneaks away from the family] On Sat, 22 Dec 2007, Willy Tarreau wrote: > On Sat, Dec 22, 2007 at 01:00:09PM -0800, Linus Torvalds wrote: > > On Sat, 22 Dec 2007, Theodore Tso wrote: > > > But sometimes when trying to eyeball what is going on, it's a lot > > > nicer just to use "cat /proc/slabinfo". > > > > .. and I call BS on this claim. > > [...] > > I can understand that it has to go away for technical reasons, but Ted > is right, please don't believe that nobody uses it just because you got > no complaint. While people are not likely to perform all computations > in scripts, at least they're used to find some quickly identifiable > patterns there. > I know when I'm looking for memory leaks, I've asked customers to give snapshots of slabinfo at periodic times (once a day even, matters how bad the leak is). This has been helpful in seeing if something did indeed leak. If you have a slab cache that constantly grows, and never shrinks, that's a good indication that something might be leaking. Not always, since there can be legitimate reasons for that, but sometimes it helps. But I still scratch my head when ever I need to touch sysfs. [/me runs back to the family] -- Steve -- 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/