From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753107AbcEZCiM (ORCPT ); Wed, 25 May 2016 22:38:12 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:35302 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752982AbcEZCiG (ORCPT ); Wed, 25 May 2016 22:38:06 -0400 From: js1304@gmail.com X-Google-Original-From: iamjoonsoo.kim@lge.com To: Andrew Morton Cc: Vlastimil Babka , mgorman@techsingularity.net, Minchan Kim , Alexander Potapenko , Hugh Dickins , Michal Hocko , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Joonsoo Kim Subject: [PATCH v2 3/7] mm/page_owner: copy last_migrate_reason in copy_page_owner() Date: Thu, 26 May 2016 11:37:51 +0900 Message-Id: <1464230275-25791-3-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1464230275-25791-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1464230275-25791-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joonsoo Kim Currently, copy_page_owner() doesn't copy all the owner information. It skips last_migrate_reason because copy_page_owner() is used for migration and it will be properly set soon. But, following patch will use copy_page_owner() and this skip will cause the problem that allocated page has uninitialied last_migrate_reason. To prevent it, this patch also copy last_migrate_reason in copy_page_owner(). Signed-off-by: Joonsoo Kim --- mm/page_owner.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/page_owner.c b/mm/page_owner.c index c6cda3e..73e202f 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -118,6 +118,7 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage) new_ext->order = old_ext->order; new_ext->gfp_mask = old_ext->gfp_mask; + new_ext->last_migrate_reason = old_ext->last_migrate_reason; new_ext->nr_entries = old_ext->nr_entries; for (i = 0; i < ARRAY_SIZE(new_ext->trace_entries); i++) -- 1.9.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id 830FC6B0253 for ; Wed, 25 May 2016 22:38:06 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id c84so18152929pfc.3 for ; Wed, 25 May 2016 19:38:06 -0700 (PDT) Received: from mail-pf0-x243.google.com (mail-pf0-x243.google.com. [2607:f8b0:400e:c00::243]) by mx.google.com with ESMTPS id yv7si10728782pab.33.2016.05.25.19.38.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 25 May 2016 19:38:05 -0700 (PDT) Received: by mail-pf0-x243.google.com with SMTP id b124so6994227pfb.0 for ; Wed, 25 May 2016 19:38:05 -0700 (PDT) From: js1304@gmail.com Subject: [PATCH v2 3/7] mm/page_owner: copy last_migrate_reason in copy_page_owner() Date: Thu, 26 May 2016 11:37:51 +0900 Message-Id: <1464230275-25791-3-git-send-email-iamjoonsoo.kim@lge.com> In-Reply-To: <1464230275-25791-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1464230275-25791-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Vlastimil Babka , mgorman@techsingularity.net, Minchan Kim , Alexander Potapenko , Hugh Dickins , Michal Hocko , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Joonsoo Kim From: Joonsoo Kim Currently, copy_page_owner() doesn't copy all the owner information. It skips last_migrate_reason because copy_page_owner() is used for migration and it will be properly set soon. But, following patch will use copy_page_owner() and this skip will cause the problem that allocated page has uninitialied last_migrate_reason. To prevent it, this patch also copy last_migrate_reason in copy_page_owner(). Signed-off-by: Joonsoo Kim --- mm/page_owner.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/page_owner.c b/mm/page_owner.c index c6cda3e..73e202f 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -118,6 +118,7 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage) new_ext->order = old_ext->order; new_ext->gfp_mask = old_ext->gfp_mask; + new_ext->last_migrate_reason = old_ext->last_migrate_reason; new_ext->nr_entries = old_ext->nr_entries; for (i = 0; i < ARRAY_SIZE(new_ext->trace_entries); i++) -- 1.9.1 -- 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