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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 CF674C47257 for ; Thu, 7 May 2020 17:29:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 949332184D for ; Thu, 7 May 2020 17:29:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="IAWbyeeU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 949332184D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lca.pw Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 26824900004; Thu, 7 May 2020 13:29:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2181A900002; Thu, 7 May 2020 13:29:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 154DC900004; Thu, 7 May 2020 13:29:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0083.hostedemail.com [216.40.44.83]) by kanga.kvack.org (Postfix) with ESMTP id EFC3A900002 for ; Thu, 7 May 2020 13:29:07 -0400 (EDT) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id AAA4F824559C for ; Thu, 7 May 2020 17:29:07 +0000 (UTC) X-FDA: 76790608734.26.pig14_4f9fae17ca917 X-HE-Tag: pig14_4f9fae17ca917 X-Filterd-Recvd-Size: 3472 Received: from mail-qv1-f41.google.com (mail-qv1-f41.google.com [209.85.219.41]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Thu, 7 May 2020 17:29:07 +0000 (UTC) Received: by mail-qv1-f41.google.com with SMTP id di6so3058338qvb.10 for ; Thu, 07 May 2020 10:29:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=bMOaygytaavUP+3oXmRtBKd6QdpGHoNfPxDGHrJDoho=; b=IAWbyeeUHvkBMoYNzo44CNsvAtPLJtb6pI954PKHBckQft4I2EW0SJ1CkgznjDz3a1 oUENBjemKejGoMt8nuW7lQU5bMi0dUJbfUcPPJ8/pfINMWh1hUVpxABmDJbd4tA4QTeM gAAohzYy5f6BGgpQdDhIDAk7SpihQpmF6bIfC6OZ58ZVoZmWI1dKHecJhSWuMgqyi7B6 ETtgdqCiHJ8aG83NAYYCHvXoYDsD64SQQzwBS+RFSccPUyYoTg0FOMACaOqHuTpXAENM U5QSM9cFpSyQi+R+kXVXIOUMCDYuItpbmcNHl67k84/2cF3R4QSjZU/sVYoYq6cY0Y5C m8Fw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=bMOaygytaavUP+3oXmRtBKd6QdpGHoNfPxDGHrJDoho=; b=BY8agIWa0Mcak+rnCkZ0UaqbBEdD0t2yQ+uMpJTzvV1DMXcho7f/QyBQneEZUWVy+S g1vgDb2/DmFd+8YXRgPJJDR14G30L+HSVk2LXPwcEOZU+xD72aMCFeDDdMr9bC8GH2tK bjksZHMjzVmEDt6gyOt5oyzWw33pQE8fol2BXfVanzI/D31pG0nCA/pC1vJHka9ayHJc mHwv1heJfI9jd8f540mvR/0TTL3+7GmivOj/LdKVkGkWN42Pnm8KCOpqhNaTFbtY9SE8 MMQUpd1d0OKzX7noWgGmWviG7AGzBgFhHDgcF7n5h8gekcGm6bw/piBDOdR576mUXPfl L8xA== X-Gm-Message-State: AGi0PubQh1TSOYPc3jJRduStamZI2w1rJCGeD9d4LWxEqiahPTXl9s2a pkooHq8C6oaoFTmRO3JWtxnOaNFQlnYf1g== X-Google-Smtp-Source: APiQypK2y+suGLYML/+oWo2pLhvykG6idqATlpGsx4Cksh/5yVouQrtGlxihrZcxPMP3VpS71oY0BA== X-Received: by 2002:a0c:ea28:: with SMTP id t8mr13693929qvp.174.1588872546164; Thu, 07 May 2020 10:29:06 -0700 (PDT) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id a12sm3935981qko.103.2020.05.07.10.29.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 07 May 2020 10:29:05 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: Kmemleak infrastructure improvement for task_struct leaks and call_rcu() Date: Thu, 7 May 2020 13:29:04 -0400 Message-Id: <40B2408F-05DD-4A82-BF97-372EA09FA873@lca.pw> References: <20200507171607.GD3180@gaia> Cc: Linux-MM , LKML , "Paul E. McKenney" In-Reply-To: <20200507171607.GD3180@gaia> To: Catalin Marinas X-Mailer: iPhone Mail (17D50) 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: > On May 7, 2020, at 1:16 PM, Catalin Marinas wrot= e: >=20 > I don't mind adding additional tracking info if it helps with debugging. > But if it's for improving false positives, I'd prefer to look deeper > into figure out why the pointer reference graph tracking failed. No, the task struct leaks are real leaks. It is just painful to figure out t= he missing or misplaced put_task_struct() from the kmemleak reports at the m= oment.=