From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755459AbcBDIcW (ORCPT ); Thu, 4 Feb 2016 03:32:22 -0500 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:36871 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755358AbcBDIcV (ORCPT ); Thu, 4 Feb 2016 03:32:21 -0500 X-IBM-Helo: d06dlp03.portsmouth.uk.ibm.com X-IBM-MailFrom: borntraeger@de.ibm.com X-IBM-RcptTo: linux-api@vger.kernel.org;linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/5] mm/vmalloc: query dynamic DEBUG_PAGEALLOC setting To: Joonsoo Kim , Andrew Morton References: <1454565386-10489-1-git-send-email-iamjoonsoo.kim@lge.com> <1454565386-10489-2-git-send-email-iamjoonsoo.kim@lge.com> Cc: David Rientjes , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Benjamin Herrenschmidt , Takashi Iwai , Chris Metcalf , Christoph Lameter , linux-api@vger.kernel.org, Joonsoo Kim From: Christian Borntraeger Message-ID: <56B30C8E.200@de.ibm.com> Date: Thu, 4 Feb 2016 09:32:14 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 In-Reply-To: <1454565386-10489-2-git-send-email-iamjoonsoo.kim@lge.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16020408-0041-0000-0000-00000727F8D7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/04/2016 06:56 AM, Joonsoo Kim wrote: > We can disable debug_pagealloc processing even if the code is complied > with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query > whether it is enabled or not in runtime. > > Signed-off-by: Joonsoo Kim Reviewed-by: Christian Borntraeger > --- > mm/vmalloc.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/mm/vmalloc.c b/mm/vmalloc.c > index fb42a5b..e0e51bd 100644 > --- a/mm/vmalloc.c > +++ b/mm/vmalloc.c > @@ -543,10 +543,10 @@ static void vmap_debug_free_range(unsigned long start, unsigned long end) > * debugging doesn't do a broadcast TLB flush so it is a lot > * faster). > */ > -#ifdef CONFIG_DEBUG_PAGEALLOC > - vunmap_page_range(start, end); > - flush_tlb_kernel_range(start, end); > -#endif > + if (debug_pagealloc_enabled()) { > + vunmap_page_range(start, end); > + flush_tlb_kernel_range(start, end); > + } > } > > /* >