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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 40C5DC433F5 for ; Mon, 14 Mar 2022 06:15:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231547AbiCNGQP (ORCPT ); Mon, 14 Mar 2022 02:16:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230508AbiCNGQO (ORCPT ); Mon, 14 Mar 2022 02:16:14 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2E3D22B1B0 for ; Sun, 13 Mar 2022 23:15:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1647238504; 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=KKkdg3dntOwBcgbQm1XQO9eQ5wZ2M2nVD2q0bsmUAZ0=; b=RLKWLDgZDq+UN35XMjCjpgJuEYiLnXjysnJa5q5dNfckJCfGPZ+20Jl+TpPTNf4Em6RabB HJnIEk1gmRVKGd5HIxdImxP3gcfRaQwDVQasZaZ2enqzqV/V88nk4YFpbEC7M77XPrdiUo rtbtCKe+Z0IQjVUbr48Rflf2pRcyBkY= Received: from mail-pf1-f199.google.com (mail-pf1-f199.google.com [209.85.210.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-18-ZAfmDZJVPzq_qUfuOC7fdw-1; Mon, 14 Mar 2022 02:15:02 -0400 X-MC-Unique: ZAfmDZJVPzq_qUfuOC7fdw-1 Received: by mail-pf1-f199.google.com with SMTP id l138-20020a628890000000b004f7cb47178cso1071648pfd.12 for ; Sun, 13 Mar 2022 23:15:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=KKkdg3dntOwBcgbQm1XQO9eQ5wZ2M2nVD2q0bsmUAZ0=; b=3Rf+ZxuuDbpLFqHyGN3XOkj873haFi5PnCNnBIWSuhBYt+SIGDcTIEfzFKabUIj5HY 0k2e5duSmPKohXN8rtlTTRCRRgvDpQb8c5YkhxFFhj/NjP1tAR+qRs45hFHjZAwD4BtP Lq+DkKvW6+rKx/9daKP4Htya4PBFbQ4jXSyDRFUrOl6ukKu+RqDZlhvVrYgQzF6S7fgq mEDEdvpKEnJDd3DWJ7yvWBvQLFjrMnvmrHxpIYHKJlcnQApt8mMO9Ef7EA4KKVyPA5Tq m5O6yqghLsJoBTA0Rf1EdPLVOPnkpuqdS9205dbv0d7XeSAdgDtpa7ikQrzokdHip3il +X/g== X-Gm-Message-State: AOAM5321gdxN2WutTNENUYklI3M11RH6nSwcTCYpi1wjtQgE7uf8QymB Rz1m1V0Nbu8lU2165EGu7lPS1AY5aLCkyQYb1GUQLWp+wgBzVbXCJiB6h0zlcKpy5boX0Zz2RRY UbyNJTkLTP/Yjx1eYfloyosE= X-Received: by 2002:a62:3896:0:b0:4f7:87dc:de5b with SMTP id f144-20020a623896000000b004f787dcde5bmr16575142pfa.49.1647238501356; Sun, 13 Mar 2022 23:15:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyCjegCsMLdY4MyXbQThlNlXg5KFF47BFkhiTqq+eHo94WlQutLx6EM8a5QWMl/FeDK0C4Hbg== X-Received: by 2002:a62:3896:0:b0:4f7:87dc:de5b with SMTP id f144-20020a623896000000b004f787dcde5bmr16575124pfa.49.1647238501100; Sun, 13 Mar 2022 23:15:01 -0700 (PDT) Received: from [10.72.13.210] ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id n18-20020a628f12000000b004f743724c75sm18185318pfd.53.2022.03.13.23.14.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 13 Mar 2022 23:15:00 -0700 (PDT) Message-ID: Date: Mon, 14 Mar 2022 14:14:53 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH] virtio-blk: support polling I/O Content-Language: en-US To: Suwan Kim , mst@redhat.com, pbonzini@redhat.com, stefanha@redhat.com Cc: virtualization@lists.linux-foundation.org, linux-block@vger.kernel.org References: <20220311152832.17703-1-suwan.kim027@gmail.com> From: Jason Wang In-Reply-To: <20220311152832.17703-1-suwan.kim027@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 在 2022/3/11 下午11:28, Suwan Kim 写道: > diff --git a/include/uapi/linux/virtio_blk.h b/include/uapi/linux/virtio_blk.h > index d888f013d9ff..3fcaf937afe1 100644 > --- a/include/uapi/linux/virtio_blk.h > +++ b/include/uapi/linux/virtio_blk.h > @@ -119,8 +119,9 @@ struct virtio_blk_config { > * deallocation of one or more of the sectors. > */ > __u8 write_zeroes_may_unmap; > + __u8 unused1; > > - __u8 unused1[3]; > + __virtio16 num_poll_queues; > } __attribute__((packed)); This looks like a implementation specific (virtio-blk-pci) optimization, how about other implementation like vhost-user-blk? Thanks