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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 0AD0DC32789 for ; Fri, 2 Nov 2018 18:31:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CAC3D2081B for ; Fri, 2 Nov 2018 18:31:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Tg8SnKN2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CAC3D2081B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728214AbeKCDjn (ORCPT ); Fri, 2 Nov 2018 23:39:43 -0400 Received: from mail-qk1-f195.google.com ([209.85.222.195]:35590 "EHLO mail-qk1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726849AbeKCDjn (ORCPT ); Fri, 2 Nov 2018 23:39:43 -0400 Received: by mail-qk1-f195.google.com with SMTP id v68-v6so4597936qka.2; Fri, 02 Nov 2018 11:31:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=Wqzgs+F0hY7K8xAcw83hHNnWx01TKifagw51GGPrFSM=; b=Tg8SnKN2mAmHPjAFLVibAuepFvy9Y8cZJ8natvhMD70Wf85NXlbpfUT59geH74D/lY jdSjBS2A7IKITR1dqgZlxkAEg04IkgLKQTxSfydSxXdS5/an1e0G5SiMtfkoQ+YXzurA qx/Sxvok/o0woQ4trKxHEbvpIqGnRCSxaI+Xk3VlKgRZeK19U8z/C12AgFnrCtwdb9ES L+D3ZRXCPQbl+C9de8rULOAasimeZMbtqsMd00MIupNKtvf+tsaNspafqNnfRkheqea3 jACyEjoHT/9AVwvoRb9pCgYNeX1NinPIZ3LkfH0ZirjeUZwMuzjSpEEwfuHF/zm/2w59 xIAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Wqzgs+F0hY7K8xAcw83hHNnWx01TKifagw51GGPrFSM=; b=pkeVfxR51thPhDh6DMTp5M3jGhALkTnsmDvdKhvevflSqMzikcg/L1VfFf9NUlOxWN dlyq5mPiV+I9Omz3SI1K6DH1oheTMwlKQ1aqbcJCVkNpF8zZaIJcdJLeRT+SH5M1KIR1 nMDUioGpil1VoJw61x/VkBk9K6ugtCWApW8aBBJoCaiLwHskAwg+rcdMnze0tVlQ3jzZ 9Uh60qn0tuDnLzokTSvJ+B66P2NHtqBENiCl7fQhw0RTVy/iA7KyWJpspELYVKpOAsbV ad4Rj0mZArJ3z4xelpUfukUv/6ygxY+PnArXHU3j55Qy97x0tAthvzF1L5zNnj8C4EOo LQTQ== X-Gm-Message-State: AGRZ1gI0XJk86RrT6RkkWf3whanpqhLVq6fsaLijPsJ0qkrk5tXJMOhj VhuO+aVPVRJGGCsm1EXtvgM53SfPS/IqUvM+j0A= X-Google-Smtp-Source: AJdET5dsRwf3WWzDSsk0ju5Y8NinDATsHApuV2GgCO69GghanlNAj06SeFBStuyspAlmSShP3L0SmSdnjm7t3IcsF1Y= X-Received: by 2002:a0c:a802:: with SMTP id w2mr9274696qva.198.1541183493707; Fri, 02 Nov 2018 11:31:33 -0700 (PDT) MIME-Version: 1.0 References: <20181102182123.29420-1-v.mayatskih@gmail.com> <20181102142446-mutt-send-email-mst@kernel.org> In-Reply-To: <20181102142446-mutt-send-email-mst@kernel.org> From: Vitaly Mayatskih Date: Fri, 2 Nov 2018 14:31:21 -0400 Message-ID: Subject: Re: [PATCH 0/1] vhost: add vhost_blk driver To: "Michael S . Tsirkin" Cc: Jason Wang , Paolo Bonzini , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sure! It needs a new QEMU driver (vhost-blk-pci), I'm preparing it to be sent out. On Fri, Nov 2, 2018 at 2:26 PM Michael S. Tsirkin wrote: > > On Fri, Nov 02, 2018 at 06:21:22PM +0000, Vitaly Mayatskikh wrote: > > vhost_blk is a host-side kernel mode accelerator for virtio-blk. The > > driver allows VM to reach a near bare-metal disk performance. See IOPS > > numbers below (fio --rw=randread --bs=4k). > > > > This implementation uses kiocb interface. It is slightly slower than > > going directly through bio, but is simpler and also works with disk > > images placed on a file system. > > > > # fio num-jobs > > # A: bare metal over block > > # B: bare metal over file > > # C: virtio-blk over block > > # D: virtio-blk over file > > # E: vhost-blk bio over block > > # F: vhost-blk kiocb over block > > # G: vhost-blk kiocb over file > > # > > # A B C D E F G > > > > 1 171k 151k 148k 151k 195k 187k 175k > > 2 328k 302k 249k 241k 349k 334k 296k > > 3 479k 437k 179k 174k 501k 464k 404k > > 4 622k 568k 143k 183k 620k 580k 492k > > 5 755k 697k 136k 128k 737k 693k 579k > > 6 887k 808k 131k 120k 830k 782k 640k > > 7 1004k 926k 126k 131k 926k 863k 693k > > 8 1099k 1015k 117k 115k 1001k 931k 712k > > 9 1194k 1119k 115k 111k 1055k 991k 711k > > 10 1278k 1207k 109k 114k 1130k 1046k 695k > > 11 1345k 1280k 110k 108k 1119k 1091k 663k > > 12 1411k 1356k 104k 106k 1201k 1142k 629k > > 13 1466k 1423k 106k 106k 1260k 1170k 607k > > 14 1517k 1486k 103k 106k 1296k 1179k 589k > > 15 1552k 1543k 102k 102k 1322k 1191k 571k > > 16 1480k 1506k 101k 102k 1346k 1202k 566k > > > > Vitaly Mayatskikh (1): > > Add vhost_blk driver > > > Thanks! > Before merging this, I'd like to get some acks from userspace that it's > actually going to be used - e.g. QEMU block maintainers. > > > drivers/vhost/Kconfig | 13 ++ > > drivers/vhost/Makefile | 3 + > > drivers/vhost/blk.c | 510 +++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 526 insertions(+) > > create mode 100644 drivers/vhost/blk.c > > > > -- > > 2.17.1 -- wbr, Vitaly