From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C7EEC3A5A8 for ; Wed, 4 Sep 2019 06:57:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EDCD422CED for ; Wed, 4 Sep 2019 06:57:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EDCD422CED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9A7936B0008; Wed, 4 Sep 2019 02:57:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 958316B000A; Wed, 4 Sep 2019 02:57:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 86DF06B000C; Wed, 4 Sep 2019 02:57:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0088.hostedemail.com [216.40.44.88]) by kanga.kvack.org (Postfix) with ESMTP id 670586B0008 for ; Wed, 4 Sep 2019 02:57:43 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 0851C181AC9BA for ; Wed, 4 Sep 2019 06:57:43 +0000 (UTC) X-FDA: 75896332806.10.smile71_261b59cb4bf0f X-HE-Tag: smile71_261b59cb4bf0f X-Filterd-Recvd-Size: 2873 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Sep 2019 06:57:41 +0000 (UTC) X-UUID: 0f275d29c86d4783ab7c06ab9ad722f7-20190904 X-UUID: 0f275d29c86d4783ab7c06ab9ad722f7-20190904 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 879257244; Wed, 04 Sep 2019 14:57:38 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 4 Sep 2019 14:57:36 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 4 Sep 2019 14:57:36 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , Andrew Morton , Thomas Gleixner , Michal Hocko , Josh Poimboeuf , Greg Kroah-Hartman CC: , , , , , , Walter Wu Subject: [PATCH 2/2] mm/page_owner: determine the last stack state of page with CONFIG_KASAN_DUMP_PAGE=y Date: Wed, 4 Sep 2019 14:57:36 +0800 Message-ID: <20190904065736.20736-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When enable CONFIG_KASAN_DUMP_PAGE, then page_owner will record last stack, So we need to know the last stack is allocation or free state. Signed-off-by: Walter Wu --- mm/page_owner.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/page_owner.c b/mm/page_owner.c index addcbb2ae4e4..2756adca250e 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -418,6 +418,12 @@ void __dump_page_owner(struct page *page) nr_entries = stack_depot_fetch(handle, &entries); pr_alert("page allocated via order %u, migratetype %s, gfp_mask %#x(%pGg)\n", page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask); +#ifdef CONFIG_KASAN_DUMP_PAGE + if ((unsigned long)page->flags & PAGE_FLAGS_CHECK_AT_PREP) + pr_info("Allocation stack of page:\n"); + else + pr_info("Free stack of page:\n"); +#endif stack_trace_print(entries, nr_entries, 0); if (page_owner->last_migrate_reason != -1) -- 2.18.0