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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E104C433EF for ; Tue, 23 Nov 2021 08:52:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 8C8266B0073; Tue, 23 Nov 2021 03:52:14 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 878126B0074; Tue, 23 Nov 2021 03:52:14 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 766B66B0075; Tue, 23 Nov 2021 03:52:14 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0119.hostedemail.com [216.40.44.119]) by kanga.kvack.org (Postfix) with ESMTP id 678706B0073 for ; Tue, 23 Nov 2021 03:52:14 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 1880F8957C for ; Tue, 23 Nov 2021 08:52:04 +0000 (UTC) X-FDA: 78839577768.16.35B56B0 Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) by imf09.hostedemail.com (Postfix) with ESMTP id 81D2A300012D for ; Tue, 23 Nov 2021 08:52:00 +0000 (UTC) Received: by mail-ed1-f42.google.com with SMTP id l25so72019104eda.11 for ; Tue, 23 Nov 2021 00:52:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=ZlSGmgK04sSRdzce60rca16DF7pHY7R8mkHLd+e2EtI=; b=ITSbDLvVQF5Pys3yfnDfjJPsOOVVYvoLjUSScohcTrvaJdHl/9EHS8d9i2S5R8Uf/K 4s2WMJQDwnIFw+lX6/BqKFRfbyJP6lGaNpaGJfzlYYrY9KqADfho7+J+Sc+eKEeB4gQM jNQovETzFOv4K7+TmCcvlFvC2Y6H2Kp/3ilLyt+hPn88AWWXvoNtfld/FvPJKoV+jfNQ aUdhg6DabReEPo7FO8FG2sjodRYZNH6wlYAuThcxUHpIjKmLyTWqB+b7b/1S5Hn0S7LA e7b6tKbcqf9trxQvprbQwmW8C54tdEuqQd+T2O/lOxhqx/ntiNtEeCL1c4i9+S6iIh5Z FjVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :subject:content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=ZlSGmgK04sSRdzce60rca16DF7pHY7R8mkHLd+e2EtI=; b=8GCxKh04ozr0CyiXi5mQ3H1oI5GGatJYajLAJWFCogjOi3qZr0WAHA9tPt5yO99N3V B2D4QDR/oF33j1UlM5+OWFt64Etq3ytXWV3sUdnkkl4BYzFsmDkIq961bsldOPuyOTuk hlLZa2yILlfnd6+7LcKQ7+8tOdS4/tqUaJT8TOuSOKXXXk9lcGDRZobQFbltwSKk7VRE rLDgCBNwOpe4Ip/jhmPDFlFd/OR0Jkajqbu22jFCjU5uQSGeRtTGtaN8klGIvddwmXOQ BwTmn2G3qft44wDSsLmmiwWVHpr5MiPCsMNAiIZg4AdxWFHR9tzwKAELWgm/nifQg0PV 46Ag== X-Gm-Message-State: AOAM533nRt4KtcwJIsHvBpx8uH85IzwrCV6FcFKQnpEcEiMC6Mljcc4+ W0GraIqAR5U+pIaWjrjUmZ8= X-Google-Smtp-Source: ABdhPJyvvvQQvkGIxCW0eOgt8FiihExxUTGI/KDUle/HeZ8ErdGrPrU0t0a4F1hxpkf//prQqRAmew== X-Received: by 2002:a17:906:961a:: with SMTP id s26mr5477877ejx.494.1637657522264; Tue, 23 Nov 2021 00:52:02 -0800 (PST) Received: from ?IPV6:2001:b07:add:ec09:c399:bc87:7b6c:fb2a? ([2001:b07:add:ec09:c399:bc87:7b6c:fb2a]) by smtp.googlemail.com with ESMTPSA id hv17sm5182114ejc.66.2021.11.23.00.51.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 23 Nov 2021 00:52:01 -0800 (PST) Message-ID: Date: Tue, 23 Nov 2021 09:51:53 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [RFC v2 PATCH 13/13] KVM: Enable memfd based page invalidation/fallocate Content-Language: en-US To: Chao Peng , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, qemu-devel@nongnu.org Cc: Jonathan Corbet , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" , Hugh Dickins , Jeff Layton , "J . Bruce Fields" , Andrew Morton , Yu Zhang , "Kirill A . Shutemov" , luto@kernel.org, john.ji@intel.com, susie.li@intel.com, jun.nakajima@intel.com, dave.hansen@intel.com, ak@linux.intel.com, david@redhat.com References: <20211119134739.20218-1-chao.p.peng@linux.intel.com> <20211119134739.20218-14-chao.p.peng@linux.intel.com> From: Paolo Bonzini In-Reply-To: <20211119134739.20218-14-chao.p.peng@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 81D2A300012D X-Stat-Signature: abog1y1ge6dwde9jts7f65etb8zsx38a Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=ITSbDLvV; dmarc=fail reason="SPF not aligned (relaxed), DKIM not aligned (relaxed)" header.from=redhat.com (policy=none); spf=pass (imf09.hostedemail.com: domain of paolo.bonzini@gmail.com designates 209.85.208.42 as permitted sender) smtp.mailfrom=paolo.bonzini@gmail.com X-HE-Tag: 1637657520-671954 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 11/19/21 14:47, Chao Peng wrote: > + list_for_each_entry(kvm, &vm_list, vm_list) { > + if (kvm == vm) > + return false; > + } > + > + return true; This would have to take the kvm_lock, but see my reply to patch 1. Paolo