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=-5.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 D8124C48BE5 for ; Tue, 15 Jun 2021 19:22:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 917956109D for ; Tue, 15 Jun 2021 19:22:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 917956109D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=TKGxmR8fcnm6wCutwXL0370d9CLbWVxKb3qmdUqNheA=; b=iXRq6lAxtEMCod VG3KvAecZpIs7NZKNf87xr3pw0Z1N/zATpCRL6QWllIEUWx24MW9/5WUScJF5UNCyKqbaGlWi6w37 a9S8vsGqWm/BQ6ffbZcWJE5+lwUGsmtlQVq6zpjjMLRW04DKdKwFmSO7iiAdsiCq1f53pFRGi04Fh 1AX+FEkYWydVZOuzi80iOldtCvliZsVQLqkuD/233VwLcNU52zCmqBgimr8ch8g35dRIC9TzI9SO3 QLNMfqEvtAOYKIsbVfQIuCMESfM6622PTMYABDUguzgHXK/ev7tIxHCV7wUe/M0eIpa3iKUSOUF4O 4J2opkoPtQOCv39db1LQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltEcX-002OWK-2H; Tue, 15 Jun 2021 19:21:10 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lt9GQ-000DDm-GW for linux-arm-kernel@bombadil.infradead.org; Tue, 15 Jun 2021 13:37:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=5okk5Vkbk9Jt8MZ6vnbKNCoK+b6xxnXivIhjQTrTdpU=; b=WJhc+rKvocpaqLDtJVMfHwCKX8 GPRydQQ5o6mwrY2ExCWg5yB8WGiG3DaGT/NrNTj80bTMuQ8C14eT1shnnY8JsyfuhawzXSXHE89mk ++aF0VYFdarw7peGEEtYLfRlo7snL5wx0cuipDxTcObhpiqj66PaZOscUo9XqrH+WOZFtfck7+mB7 dTLMVi6EutHUy+54cgBzG/eFj0oWd3Rsyq9CVnGu/2wm2I54udNNvkqM3Hc4xJj56cEJyd4Lr+B17 HdJ9FwIjaTD/n82oBHxj33LIiomho7a0EtpdA4CDQaX6wmx/I9v/U3YxyXKfQ7hrMt9jTTNV9/Rxx p3AYka2Q==; Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lt6gI-007kPW-2O for linux-arm-kernel@lists.infradead.org; Tue, 15 Jun 2021 10:52:38 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id E289B61454; Tue, 15 Jun 2021 10:52:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623754355; bh=5okk5Vkbk9Jt8MZ6vnbKNCoK+b6xxnXivIhjQTrTdpU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pfh/TyxcKk3pGjnoRP8cZX5TJvSehgTICQDCxDfjOHm0lXL3icqOGhYnjsHjyI9oH EyJNJDqzhB2giutFr4ZpWkgWm+liQiLkf+fQX5M9UhcXEUFWGo8nwLkDXrx7z/Qqur 9VeS/n19RZ3QVO9UuIqxZHpgBNOBSuyn+XLRJenOow+OfWZfj01OZ3/7QIQQzb+lzk /PAaSYf499ZA9oiQplMGqxYSFpl3yD4KlpBa9pYRyj0TT01La1Kntti/Fy5cyThgqD lss7eS5Wdp0KQZ7HV0xNuAZbYlC+riLCwMGGW9RdJh503kDbYt/0SKHj5dIQPOrmxZ R0q/2D3ORMkpw== Date: Tue, 15 Jun 2021 11:52:30 +0100 From: Will Deacon To: Yu Zhao Cc: Jia He , Catalin Marinas , Mark Rutland , Marc Zyngier , Suzuki Poulose , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] arm64: mm: fix warning in arch_faults_on_old_pte() Message-ID: <20210615105230.GD20225@willie-the-truck> References: <20210613214728.1695340-1-yuzhao@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210613214728.1695340-1-yuzhao@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210615_115237_121352_57A56541 X-CRM114-Status: UNSURE ( 7.59 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Sun, Jun 13, 2021 at 03:47:28PM -0600, Yu Zhao wrote: > cow_user_page() doesn't disable preemption, and it triggers the > warning in arch_faults_on_old_pte() when CONFIG_PREEMPT_COUNT=y. Doesn't kmap_atomic() disable preemption? How can I reproduce the warning? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel