From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f52.google.com (mail-pa0-f52.google.com [209.85.220.52]) by dpdk.org (Postfix) with ESMTP id D67342C40 for ; Sun, 25 Sep 2016 03:49:56 +0200 (CEST) Received: by mail-pa0-f52.google.com with SMTP id qn7so33962574pac.3 for ; Sat, 24 Sep 2016 18:49:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=EEcmzJsz7EINZWehHSHNVKnA0BvUpA1w400G8QY3iGo=; b=IGYSVm9GemHMYX4cBhnOL+mSCyvqNiRMZhh6QwD/T80ZzBcnPvdyskTwbaJrctpotK YGWKNKrTbKC5S8lmhz0FIZJKIY9pfRXoGO3T0j1JOWXRsnWOZbN+4k/sDCYwHQLwdbeR z6ufx3k3/TpCD0aG515u1aUPpFR+M4PqPfWst6lFXVXbSoJhZZzn5MxYvh/KRhfVBHfn zwWIkiByq7bUjjqPZfIdhih1LLp5wQ3ozBsL5/d5rjrmn5wyQHbQtgC/h6M9/BJpTk7x qPKpOc7MHBEQVF4Pm6BMgAXaO1KMIFYFaf3EzF/DcfCDiuhJ9fcq1+YmiAYkjd7aDl72 yT1w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EEcmzJsz7EINZWehHSHNVKnA0BvUpA1w400G8QY3iGo=; b=K82VM2zokpG7urYl1Am5FY3Nib0eZtCFQ86DatCd6rVLz0tEUymJzsIbpEwkbgalN/ bMC36EqZxrPvEVtmawjvDpahrrZg04bt38kXPa36kvUOvN4vvRuHlHHs44xJ9MiEvJIl UywCg6ZlJSJhYlafKn9B5xTY6TzZynTzja8u1lgd1N+UmQtzMmCe/vEe4SYxV9uXTgED 8cF3ZLu1LRlVrm/p9oIQCVbe7rNpkBIH0zahJxPKk4jyAD2V3eEGBHmuYi4YKcl7iuk3 qRfxcHjR2GXbO3Oru88qRpTsHHBdd/vWhtHvJmwr4YCCvYrqVJs2wDbXS7hPosMuyJ0t J2SA== X-Gm-Message-State: AE9vXwM1+zWxvWQWpjB3UyM5siE2tDbvgjilIlFjF5SOKZ8xIyfjnLHSFLD0SJiirPWl9A== X-Received: by 10.66.148.68 with SMTP id tq4mr25697564pab.160.1474768196192; Sat, 24 Sep 2016 18:49:56 -0700 (PDT) Received: from xeon-e3 (static-50-53-69-251.bvtn.or.frontiernet.net. [50.53.69.251]) by smtp.gmail.com with ESMTPSA id z185sm20970775pfb.56.2016.09.24.18.49.55 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 24 Sep 2016 18:49:55 -0700 (PDT) Date: Sat, 24 Sep 2016 18:50:07 -0700 From: Stephen Hemminger To: "Michael S. Tsirkin" Cc: Maxime Coquelin , yuanhan.liu@linux.intel.com, huawei.xie@intel.com, dev@dpdk.org, vkaplans@redhat.com Message-ID: <20160924185007.19f21a7e@xeon-e3> In-Reply-To: <20160925035832-mutt-send-email-mst@kernel.org> References: <1474615009-26626-1-git-send-email-maxime.coquelin@redhat.com> <20160923112416.4f798b4b@xeon-e3> <20160923213055-mutt-send-email-mst@kernel.org> <20160923132805.3207f1fa@xeon-e3> <20160925035832-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH v2] vhost: Add indirect descriptors support to the TX path X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Sep 2016 01:49:57 -0000 On Sun, 25 Sep 2016 04:02:28 +0300 "Michael S. Tsirkin" wrote: > I see. It's implied by VERSION_1 in fact. > In other words if VERSION_1 is negotiated then bit 27 > isn't ANY_LAYOUT, it's in fact reserved. But what if guest isn't using Version 1? Legacy distro's certainly won't have it enabled.