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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,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 176A8C34047 for ; Wed, 19 Feb 2020 11:10:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DFA9C208E4 for ; Wed, 19 Feb 2020 11:10:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NYdbTTrM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726636AbgBSLK4 (ORCPT ); Wed, 19 Feb 2020 06:10:56 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:43965 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726497AbgBSLK4 (ORCPT ); Wed, 19 Feb 2020 06:10:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582110655; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G9ngAADFf0H6tNXWrWk3zBJLW6Dh0uOu2zK7HumFKqU=; b=NYdbTTrMYiXJDJMzEB/CHob6QpOyqtvlq1IgrFcD9CBipInSyUIDU+kGpRUy+ubnt4slYx ilWuSUR6F8rc9PVd+3ytguZ3E/HVYQfzms8Uu2cFMamaJiCEUuPCh0PqNQkqJIjlhYsXzc bU7DGq+oyOTa7BNpd9r0xvbP6r5X+c8= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-326-bvt_ygSfMgOqvjdqwvGhjw-1; Wed, 19 Feb 2020 06:10:52 -0500 X-MC-Unique: bvt_ygSfMgOqvjdqwvGhjw-1 Received: by mail-wm1-f69.google.com with SMTP id y7so40047wmd.4 for ; Wed, 19 Feb 2020 03:10:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=G9ngAADFf0H6tNXWrWk3zBJLW6Dh0uOu2zK7HumFKqU=; b=A29xkfbVI4XpjT9sgDDqVShPJnGfxBSteRX+NvVUoeC7CpYawonuAEYJ0Z7oLIsf94 yNYdgX553sOmPvkTRW+64xL6ZsuEWRjHjLcqpqrN0PQlrhDJJandcGvXfyld926Mp2j2 rTvZUVzK6zZhbI5JoemT3O9mjG00Eics/uMc6Y8ONupNtSwo+zyJmrZD9J2G8uMjwli1 lQw259g0hemdFSgPSpHqSqnJzwN5INijbQgvhQeramwrj2R7kqA5NScGz81+mfFI1kHs BcOu0aEaXuliL7d+mSfT550ONGyND7aOD4pxftErC47RzkolYGaGzr5TxT3Ay0jgSB15 FxUw== X-Gm-Message-State: APjAAAWjVlx+3mBqX4bluylbFBoQKG3UfY0ENgIDvgc5BYaKlXxpQSFx 9hrljwJERml2bvxlyBYkittMNmcdFTqYSFWALrTryH53sDjsKVSCSNoEja+ga+pRIh8VyUlpglX mL2KOTkWyJ0gjdKrZJ48J5p5T0w== X-Received: by 2002:a7b:c183:: with SMTP id y3mr8994474wmi.45.1582110651008; Wed, 19 Feb 2020 03:10:51 -0800 (PST) X-Google-Smtp-Source: APXvYqxgHklSoTJAASymtkOJdhkIhiMJIFRI+F05r4Zs/xNP/kGoNa/TNx+0pu+EJD1dPQoyvi+MUw== X-Received: by 2002:a7b:c183:: with SMTP id y3mr8994454wmi.45.1582110650820; Wed, 19 Feb 2020 03:10:50 -0800 (PST) Received: from ?IPv6:2001:b07:6468:f312:ec41:5e57:ff4d:8e51? ([2001:b07:6468:f312:ec41:5e57:ff4d:8e51]) by smtp.gmail.com with ESMTPSA id e1sm2438009wrt.84.2020.02.19.03.10.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Feb 2020 03:10:50 -0800 (PST) Subject: Re: [RFC] eventfd: add EFD_AUTORESET flag To: Avi Kivity , Stefan Hajnoczi Cc: Stefan Hajnoczi , linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Davide Libenzi , Alexander Viro References: <20200129172010.162215-1-stefanha@redhat.com> <66566792-58a4-bf65-6723-7d2887c84160@redhat.com> <20200212102912.GA464050@stefanha-x1.localdomain> <156cb709-282a-ddb6-6f34-82b4bb211f73@redhat.com> <20200219103704.GA1076032@stefanha-x1.localdomain> From: Paolo Bonzini Message-ID: Date: Wed, 19 Feb 2020 12:10:50 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On 19/02/20 11:43, Avi Kivity wrote: > >> Thanks, that's a nice idea!  I already have experimental io_uring fd >> monitoring code written for QEMU and will extend it to use >> IORING_OP_READ. > > Note linux-aio can do IOCB_CMD_POLL, starting with 4.19. That was on the todo list, but io_uring came first. :) Paolo