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=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_2 autolearn=ham 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 B5B7AC4CEC6 for ; Thu, 12 Sep 2019 14:08:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 83AEC208E4 for ; Thu, 12 Sep 2019 14:08:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83AEC208E4 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 1A8176B0005; Thu, 12 Sep 2019 10:08:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1579C6B0006; Thu, 12 Sep 2019 10:08:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 095006B0007; Thu, 12 Sep 2019 10:08:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0227.hostedemail.com [216.40.44.227]) by kanga.kvack.org (Postfix) with ESMTP id DC5CA6B0005 for ; Thu, 12 Sep 2019 10:08:37 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 7EB008243762 for ; Thu, 12 Sep 2019 14:08:37 +0000 (UTC) X-FDA: 75926449074.13.cloud69_2e0480dbe0331 X-HE-Tag: cloud69_2e0480dbe0331 X-Filterd-Recvd-Size: 3063 Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by imf47.hostedemail.com (Postfix) with ESMTP for ; Thu, 12 Sep 2019 14:08:35 +0000 (UTC) X-UUID: 88ef5b91e7cc45ca9b12d53609cb2ee6-20190912 X-UUID: 88ef5b91e7cc45ca9b12d53609cb2ee6-20190912 Received: from mtkcas08.mediatek.inc [(172.21.101.126)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1916237428; Thu, 12 Sep 2019 22:08:30 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 12 Sep 2019 22:08:28 +0800 Received: from [172.21.84.99] (172.21.84.99) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Thu, 12 Sep 2019 22:08:27 +0800 Message-ID: <1568297308.19040.5.camel@mtksdccf07> Subject: Re: [PATCH v3] mm/kasan: dump alloc and free stack for page allocator From: Walter Wu To: Vlastimil Babka CC: Qian Cai , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , "Andrew Morton" , Martin Schwidefsky , Andrey Konovalov , "Arnd Bergmann" , , , , , , Date: Thu, 12 Sep 2019 22:08:28 +0800 In-Reply-To: References: <20190911083921.4158-1-walter-zh.wu@mediatek.com> <5E358F4B-552C-4542-9655-E01C7B754F14@lca.pw> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-MTK: N X-Bogosity: Ham, tests=bogofilter, spamicity=0.000007, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > extern void __reset_page_owner(struct page *page, unsigned int order); > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index 6c9682ce0254..dc560c7562e8 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -41,6 +41,8 @@ config KASAN_GENERIC > select SLUB_DEBUG if SLUB > select CONSTRUCTORS > select STACKDEPOT > + select PAGE_OWNER > + select PAGE_OWNER_FREE_STACK > help > Enables generic KASAN mode. > Supported in both GCC and Clang. With GCC it requires version 4.9.2 > @@ -63,6 +65,8 @@ config KASAN_SW_TAGS > select SLUB_DEBUG if SLUB > select CONSTRUCTORS > select STACKDEPOT > + select PAGE_OWNER > + select PAGE_OWNER_FREE_STACK > help What is the difference between PAGE_OWNER+PAGE_OWNER_FREE_STACK and DEBUG_PAGEALLOC? If you directly enable PAGE_OWNER+PAGE_OWNER_FREE_STACK PAGE_OWNER_FREE_STACK,don't you think low-memory device to want to use KASAN?