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=-5.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 A7977C4727C for ; Fri, 25 Sep 2020 23:01:12 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3E34A21775 for ; Fri, 25 Sep 2020 23:01:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="d6YYUHhs"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="i68A1tT8"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="2mWokoRS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E34A21775 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References:In-Reply-To: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=4lnKyDtiSQ0FBepF6PhqtK9WOchJ7GAsFZeqcf4qXtc=; b=d6YYUHhsKrQFrwsnSH2PtHao3 GBfI7rsUIneg6HDmf0Lh/Jf+g3tvK8BUs/ZqGaAyDpbtWJuhUEn1D3hbteXoGxYw/heDTvaTNKd3w Fah4sCSpEMV32rj1aTFZD3kIuF+YH1gONd92dEnrRRjYg1IZNIBxH5+ZlPzTZKJbV/t3TdZ8DdpTo 8WSzckIMAmJrSGq3dvlOzb0MD6e8B+w3Glo1F1/yIytBQ9MHFO0JMRLUqaRHli82jl9U1F06NeIHw qBE/9VfC8pEd4r1ae57YQJZV/9JT4OJ9NLKI7+EUIFqQGZdEFqEx2zcYvgyG/OhIm9utP+7j5rwPw iJLmFPltw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLwgn-0004qM-8R; Fri, 25 Sep 2020 22:59:41 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLwgk-0004pn-8W; Fri, 25 Sep 2020 22:59:39 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1601074776; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=xNfIywwa8zLp7Ze2sUjIPjT6qUcXBaqd2I3y05VFQpk=; b=i68A1tT8A/9EgAmBPvJHilJ6RBDhd4/QF+g/MLgQuc/v1+mdbNY8WaeAszXaDnCric2Akk KmDZ/Lc1xD6A/6ODG9xAPKNYDDsBE2nybK5rmyc4G20JNX4edmbL7MriKBcYu4Q23Du+xq quDNOluI2E7ZWAPNm6p4t1HiWrnqxRvryKC5u45mpVVpm3XaICWRoRjC9Ob5ruJaf5l14a wpig8PghERkqsJaSQBkduAOY5R012KtRu5gwJBw+RvVGbKgjvY9LoakcRfmEYOb+sp/BET NRJu3zb0X3mD7QAmUifsEaNQWw0UUBUOt7xmVnnxT7WBSmHlm/dhxSfwMCwy5g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1601074776; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=xNfIywwa8zLp7Ze2sUjIPjT6qUcXBaqd2I3y05VFQpk=; b=2mWokoRSIrGozji4bFmvucaPRe+NHLQXPr6rwiZVkAx2M7CgxaJ05sXDgjvu2vMLGeEZbx PCndjBlCAkGPwYDg== To: Walter Wu Subject: Re: [PATCH v4 1/6] timer: kasan: record timer stack In-Reply-To: <1601025346.2255.2.camel@mtksdccf07> References: <20200924040335.30934-1-walter-zh.wu@mediatek.com> <87h7rm97js.fsf@nanos.tec.linutronix.de> <1601018323.28162.4.camel@mtksdccf07> <87lfgyutf8.fsf@nanos.tec.linutronix.de> <1601025346.2255.2.camel@mtksdccf07> Date: Sat, 26 Sep 2020 00:59:35 +0200 Message-ID: <87wo0htqco.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200925_185938_446100_D6FC6086 X-CRM114-Status: UNSURE ( 9.83 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marco Elver , wsd_upstream , Stephen Boyd , Alexander Potapenko , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, John Stultz , linux-arm-kernel@lists.infradead.org, Andrey Konovalov , Matthias Brugger , Andrey Ryabinin , Andrew Morton , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Sep 25 2020 at 17:15, Walter Wu wrote: > On Fri, 2020-09-25 at 10:55 +0200, Thomas Gleixner wrote: >> > We don't want to replace DEBUG_OBJECTS_TIMERS with this patches, only >> > hope to use low overhead(compare with DEBUG_OBJECTS_TIMERS) to debug >> >> KASAN has lower overhead than DEBUG_OBJECTS_TIMERS? Maybe in a different >> universe. >> > I mean KASAN + our patch vs KASAN + DEBUG_OBJECTS_TIMERS. The front one > have the information to the original caller and help to debug. It is > smaller overhead than the one behind. For ONE specific problem related to timers and you have still not shown a single useful debug output where this information helps to debug anything. > I agree your saying, so that I need to find out a use case to explain to > you. Indeed. Thanks, tglx _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel