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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 65598C43331 for ; Mon, 11 Nov 2019 16:30:41 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2FCDA20656 for ; Mon, 11 Nov 2019 16:30:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WOUABWHa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2FCDA20656 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iUCaM-0006N0-TJ for qemu-devel@archiver.kernel.org; Mon, 11 Nov 2019 11:30:40 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:42402) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iUCRm-0005in-9n for qemu-devel@nongnu.org; Mon, 11 Nov 2019 11:21:47 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iUCRl-0003Jw-8s for qemu-devel@nongnu.org; Mon, 11 Nov 2019 11:21:46 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:59408 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iUCRl-0003Jf-51 for qemu-devel@nongnu.org; Mon, 11 Nov 2019 11:21:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1573489304; 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: in-reply-to:in-reply-to:references:references; bh=olu6X+f7cBSJJtezAfharfp+tvEfViynwT3zaJwaAek=; b=WOUABWHakfYqIvlqL0X/JbHwjaonlq5RQExPAgDzR3v9WpsDNOu5Sz6sk8nNZhqswnclVR 5bMzCWYPj/auv5WLEo/udb4Ub0qSw+dBKzTAMopY6Vj9wkmMjR7l4m5GG7d3BgFSSvkYkA qaukq8/Ey20C08TaW7AWEngIOn0PPds= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-198-y14W_-62PSGWyQwnoNVqjw-1; Mon, 11 Nov 2019 11:21:41 -0500 X-MC-Unique: y14W_-62PSGWyQwnoNVqjw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 75626186923B; Mon, 11 Nov 2019 16:21:39 +0000 (UTC) Received: from localhost (ovpn-117-169.ams2.redhat.com [10.36.117.169]) by smtp.corp.redhat.com (Postfix) with ESMTP id E2C254145; Mon, 11 Nov 2019 16:21:33 +0000 (UTC) Date: Mon, 11 Nov 2019 16:21:32 +0000 From: Stefan Hajnoczi To: Jagannathan Raman Subject: Re: [RFC v4 PATCH 32/49] multi-process: Use separate MMIO communication channel Message-ID: <20191111162132.GI402228@stefanha-x1.localdomain> References: MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="HuXIgs6JvY9hJs5C" Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, fam@euphon.net, thuth@redhat.com, john.g.johnson@oracle.com, ehabkost@redhat.com, konrad.wilk@oracle.com, quintela@redhat.com, berrange@redhat.com, mst@redhat.com, qemu-devel@nongnu.org, armbru@redhat.com, ross.lagerwall@citrix.com, kanth.ghatraju@oracle.com, kraxel@redhat.com, kwolf@redhat.com, pbonzini@redhat.com, liran.alon@oracle.com, marcandre.lureau@gmail.com, mreitz@redhat.com, dgilbert@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --HuXIgs6JvY9hJs5C Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Oct 24, 2019 at 05:09:13AM -0400, Jagannathan Raman wrote: > Using a separate communication channel for MMIO helps > with improving Performance Why? 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