From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932448AbaHVQp0 (ORCPT ); Fri, 22 Aug 2014 12:45:26 -0400 Received: from www.sr71.net ([198.145.64.142]:55306 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932098AbaHVQpZ (ORCPT ); Fri, 22 Aug 2014 12:45:25 -0400 Message-ID: <53F773A2.7040904@sr71.net> Date: Fri, 22 Aug 2014 09:45:22 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Tim Chen CC: linux-kernel@vger.kernel.org, dave.hansen@linux.intel.com, peterz@infradead.org, mingo@redhat.com, ak@linux.intel.com, akpm@linux-foundation.org, cl@linux.com, penberg@kernel.org, linux-mm@kvack.org, kirill@shutemov.name, lauraa@codeaurora.org Subject: Re: [PATCH] [v3] warn on performance-impacting configs aka. TAINT_PERFORMANCE References: <20140821202424.7ED66A50@viggo.jf.intel.com> <1408725157.4347.14.camel@schen9-DESK> In-Reply-To: <1408725157.4347.14.camel@schen9-DESK> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/22/2014 09:32 AM, Tim Chen wrote: >> > +#ifdef CONFIG_DEBUG_OBJECTS_FREE >> > + "DEBUG_OBJECTS_FREE", >> > +#endif >> > +#ifdef CONFIG_DEBUG_KMEMLEAK >> > + "DEBUG_KMEMLEAK", >> > +#endif >> > +#ifdef CONFIG_DEBUG_PAGEALLOC >> > + "DEBUG_PAGEALLOC", > I think coverage profiling also impact performance. > So I sould also put CONFIG_GCOV_KERNEL in the list. Would CONFIG_GCOV_PROFILE_ALL be the better one to check? With plain GCOV_KERNEL, I don't think we will, by default, put the coverage information in any files and slow them down.