From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by kanga.kvack.org (Postfix) with ESMTP id 221E36B0035 for ; Tue, 19 Aug 2014 20:03:09 -0400 (EDT) Received: by mail-pa0-f52.google.com with SMTP id bj1so11015804pad.25 for ; Tue, 19 Aug 2014 17:03:08 -0700 (PDT) Received: from qmta09.emeryville.ca.mail.comcast.net (qmta09.emeryville.ca.mail.comcast.net. [2001:558:fe2d:43:76:96:30:96]) by mx.google.com with ESMTP id q16si29202345pdn.96.2014.08.19.17.03.07 for ; Tue, 19 Aug 2014 17:03:08 -0700 (PDT) Date: Tue, 19 Aug 2014 19:03:03 -0500 (CDT) From: Christoph Lameter Subject: Re: [PATCH] [RFC] TAINT_PERFORMANCE In-Reply-To: <53F3E1FE.1000508@codeaurora.org> Message-ID: References: <20140819212604.6C94DF09@viggo.jf.intel.com> <53F3E1FE.1000508@codeaurora.org> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Laura Abbott Cc: Dave Hansen , linux-kernel@vger.kernel.org, dave.hansen@linux.intel.com, peterz@infradead.org, mingo@redhat.com, ak@linux.intel.com, tim.c.chen@linux.intel.com, akpm@linux-foundation.org, penberg@kernel.org, linux-mm@kvack.org On Tue, 19 Aug 2014, Laura Abbott wrote: > I nominate CONFIG_DEBUG_PAGEALLOC, CONFIG_SLUB_DEBUG, > CONFIG_SLUB_DEBUG_ON as well since I've wasted days debugging > supposed performance issues where those were on. CONFIG_SLUB_DEBUG is not enabling debugging. It just includes the code to do so at kernel bootup. Not a performance problem. CONFIG_SLUB_DEBUG_ON is a performance issue since debugging will be on by default. CONFIG_SLAB_DEBUG is also a performance issue since this option makes slab run with debugging. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org