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=-5.8 required=3.0 tests=BAYES_00,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 BFFE1C433ED for ; Tue, 27 Apr 2021 15:23:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F2A9613C6 for ; Tue, 27 Apr 2021 15:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236488AbhD0PYa (ORCPT ); Tue, 27 Apr 2021 11:24:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235974AbhD0PY3 (ORCPT ); Tue, 27 Apr 2021 11:24:29 -0400 Received: from mail-ed1-x52a.google.com (mail-ed1-x52a.google.com [IPv6:2a00:1450:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2EA2DC061574 for ; Tue, 27 Apr 2021 08:23:46 -0700 (PDT) Received: by mail-ed1-x52a.google.com with SMTP id h10so70406384edt.13 for ; Tue, 27 Apr 2021 08:23:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=gc8woWbNxJbdvRRggI1IoUfbNc9lkDvROsvEblMei44=; b=lHGyM1d4Yy8DrhiOvl+mjtGGME5UNFBuzOhI7Nn9p7VfCVa/JwXm73/nfjycJXjkp4 EJAk/7o0DUGO/VajmOLMlhIBYX9ICQ/jdpAwZuPb/KynHPPnKHGRxsdEtqKftN7lw5/E yi47mPq1fc+f1on1f1qFJPNr1OCMWE/KGHvDrosC5VSK+EkZMLLvIwVXZtdugCRWQuCL 3x5yMxbq2deYKwZZc8sU+s/Ptr0lpMVxNPvdPM2HPzhQmaptrG1hrqWqN7+sIn9OLKW9 cDDPdU+OVltMGb7CVfZqkXFlfIcQ/iGWZ3u4QhDXrTev/WdDiBcNF4BYl+2PLvJEa/UX Jw0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=gc8woWbNxJbdvRRggI1IoUfbNc9lkDvROsvEblMei44=; b=U9SXfE6PenqEdM6s/Cn6nrmT5qx0vaw84Ef9GIjz+bN8lRA/lqTfIz8ZgNEAO9xKaK 5XBVi1w0f6flexYEto/lV4otGn/ZeHDVN1j3VLRmwNQVuKWw5uLx3U2c2x8m5q8cffOp 63cnnb9Zj4WZzau7ohGiBCRU/QDskrE+Kkc9VmLTTMydi6AZiv/ollJyvWv4zU+xmsj7 uvz0xgpwHPRL4SuKgCxPK9/6YXIbEleB2sBBpmayu9LUS+UoAjH6OCRan5PEtnGxyCi5 gsxt/ugVSSQpST3P0bJqBm9atZZ4kjrd14NW6myOIXca0adGVHlG8Pm6ruqL4k+HTY+J 1FIw== X-Gm-Message-State: AOAM530ac/jZHBIDTjOdnZa6Yuvp5dm5y4zA13q4vKgUM1qu9AyS+unh rAi8VuAEZ44TMVFvA3QKiBaNMQ== X-Google-Smtp-Source: ABdhPJzUbrl2tMkMNoxFod1mRAGmCI1qrAttTgk/bfethyZA8K+AFiBsKzPZFj4LAwxcZcPOR1Gpkw== X-Received: by 2002:a05:6402:1cb9:: with SMTP id cz25mr5022442edb.163.1619537024959; Tue, 27 Apr 2021 08:23:44 -0700 (PDT) Received: from myrica ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id f11sm140948ejc.62.2021.04.27.08.23.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Apr 2021 08:23:44 -0700 (PDT) Date: Tue, 27 Apr 2021 17:23:26 +0200 From: Jean-Philippe Brucker To: Alexandru Elisei Cc: Marc Zyngier , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, James Morse , Suzuki K Poulose , kernel-team@android.com, Krishna Reddy , Sumit Gupta Subject: Re: [PATCH] KVM: arm64: Skip CMOs when updating a PTE pointing to non-memory Message-ID: References: <20210426103605.616908-1-maz@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Apr 27, 2021 at 03:52:46PM +0100, Alexandru Elisei wrote: > The comment [1] suggested that the panic is triggered during page aging. I think only with an out-of-tree patch applied https://jpbrucker.net/git/linux/commit/?h=sva/2021-03-01&id=d32d8baaf293aaefef8a1c9b8a4508ab2ec46c61 which probably is not going upstream. Thanks, Jean > vfio_pci_mmap() sets the VM_PFNMAP for the VMA and I see in the Documentation that > pages with VM_PFNMAP are added to the unevictable LRU list, doesn't that mean it's > not subject the page aging? I feel like there's something I'm missing. > > [1] > https://lore.kernel.org/kvm/BY5PR12MB37642B9AC7E5D907F5A664F6B3459@BY5PR12MB3764.namprd12.prod.outlook.com/ > > Thanks, > > Alex