From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934228AbcBDF6Y (ORCPT ); Thu, 4 Feb 2016 00:58:24 -0500 Received: from mail-pf0-f179.google.com ([209.85.192.179]:36483 "EHLO mail-pf0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934135AbcBDF5q (ORCPT ); Thu, 4 Feb 2016 00:57:46 -0500 From: Joonsoo Kim X-Google-Original-From: Joonsoo Kim To: Andrew Morton Cc: David Rientjes , Christian Borntraeger , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Benjamin Herrenschmidt , Takashi Iwai , Chris Metcalf , Christoph Lameter , linux-api@vger.kernel.org, Joonsoo Kim Subject: [PATCH 5/5] tile: query dynamic DEBUG_PAGEALLOC setting Date: Thu, 4 Feb 2016 14:56:26 +0900 Message-Id: <1454565386-10489-6-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1454565386-10489-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1454565386-10489-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- arch/tile/mm/init.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c index d4e1fc4..a0582b7 100644 --- a/arch/tile/mm/init.c +++ b/arch/tile/mm/init.c @@ -896,17 +896,15 @@ void __init pgtable_cache_init(void) panic("pgtable_cache_init(): Cannot create pgd cache"); } -#ifdef CONFIG_DEBUG_PAGEALLOC -static long __write_once initfree; -#else static long __write_once initfree = 1; -#endif +static bool __write_once set_initfree_done; /* Select whether to free (1) or mark unusable (0) the __init pages. */ static int __init set_initfree(char *str) { long val; if (kstrtol(str, 0, &val) == 0) { + set_initfree_done = true; initfree = val; pr_info("initfree: %s free init pages\n", initfree ? "will" : "won't"); @@ -919,6 +917,11 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end) { unsigned long addr = (unsigned long) begin; + /* Prefer user request first */ + if (!set_initfree_done) { + if (debug_pagealloc_enabled()) + initfree = 0; + } if (kdata_huge && !initfree) { pr_warn("Warning: ignoring initfree=0: incompatible with kdata=huge\n"); initfree = 1; -- 1.9.1