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=-0.9 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 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 72AC1C32771 for ; Mon, 6 Jan 2020 08:33:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38B4721775 for ; Mon, 6 Jan 2020 08:33:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="V1Oeaj2c" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725945AbgAFIds (ORCPT ); Mon, 6 Jan 2020 03:33:48 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:35575 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725446AbgAFIds (ORCPT ); Mon, 6 Jan 2020 03:33:48 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578299627; 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=49l6bjAclyz7lkwNh/P8L5o26bsK4TdQICyfzEA+dF4=; b=V1Oeaj2cyBI23IBe4OP0evitsmgYLB1tvxd5N5I1i+3m9PnQKvcW+hgvS6auz5ZOyb3bC9 OPiaSTqW9PQHJ15igQauQGiPmnmg6SBx01SpOz9NYA/2s6wTN0pFuZFeASCg5s5fWtgjNz KvQKxUENxD6kLV/YKW9wM7bCUc8S3pw= 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-371-IEiZZk7uNTuVn5dCgRwItg-1; Mon, 06 Jan 2020 03:33:44 -0500 X-MC-Unique: IEiZZk7uNTuVn5dCgRwItg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A0B67593AC; Mon, 6 Jan 2020 08:33:41 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-98.ams2.redhat.com [10.36.116.98]) by smtp.corp.redhat.com (Postfix) with ESMTP id BA13D5D9CA; Mon, 6 Jan 2020 08:33:36 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id EB7CA31E8E; Mon, 6 Jan 2020 09:33:35 +0100 (CET) Date: Mon, 6 Jan 2020 09:33:35 +0100 From: Gerd Hoffmann To: Tomasz Figa Cc: Dmitry Sepp , virtio-dev@lists.oasis-open.org, Keiichi Watanabe , Linux Media Mailing List , Alexandre Courbot , Alex Lau , Daniel Vetter , Dylan Reid , Enrico Granata , Frediano Ziglio , Hans Verkuil , =?utf-8?B?U3TDqXBoYW5l?= Marchesin , Pawel Osciak , spice-devel@lists.freedesktop.org, David Stevens , uril@redhat.com Subject: Re: [virtio-dev] Re: [PATCH v2 1/1] virtio-video: Add virtio video device specification Message-ID: <20200106083335.jmzhavtlq7ppgtic@sirius.home.kraxel.org> References: <20191218130214.170703-1-keiichiw@chromium.org> <20191218130214.170703-2-keiichiw@chromium.org> <2932378.s8JBUXtX1Y@os-lin-dmo> <2322065.f0tlG9Vh6p@os-lin-dmo> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hi, > > We also see the need to add a max_streams value to this structure so as to > > explicitly provide a limit on the number of streams the guest can create. > > What would be the advantage over just trying to create one and > failing? The maximum number would be only meaningful for the special > case when the streams are always only created by one user space > process. Otherwise, if several processes do that, they are not aware > of each other and the number could be higher than they can actually > create, because other processes could have some streams created > already. Also the number of streams might not be fixed but depend on stream parameters, i.e. hardware can decode one hd or two sd streams ... cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-6596-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 8BA31984400 for ; Mon, 6 Jan 2020 08:33:48 +0000 (UTC) Date: Mon, 6 Jan 2020 09:33:35 +0100 From: Gerd Hoffmann Message-ID: <20200106083335.jmzhavtlq7ppgtic@sirius.home.kraxel.org> References: <20191218130214.170703-1-keiichiw@chromium.org> <20191218130214.170703-2-keiichiw@chromium.org> <2932378.s8JBUXtX1Y@os-lin-dmo> <2322065.f0tlG9Vh6p@os-lin-dmo> MIME-Version: 1.0 In-Reply-To: Subject: Re: [virtio-dev] Re: [PATCH v2 1/1] virtio-video: Add virtio video device specification Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline To: Tomasz Figa Cc: Dmitry Sepp , virtio-dev@lists.oasis-open.org, Keiichi Watanabe , Linux Media Mailing List , Alexandre Courbot , Alex Lau , Daniel Vetter , Dylan Reid , Enrico Granata , Frediano Ziglio , Hans Verkuil , =?utf-8?B?U3TDqXBoYW5l?= Marchesin , Pawel Osciak , spice-devel@lists.freedesktop.org, David Stevens , uril@redhat.com List-ID: Hi, > > We also see the need to add a max_streams value to this structure so as= to > > explicitly provide a limit on the number of streams the guest can creat= e. >=20 > What would be the advantage over just trying to create one and > failing? The maximum number would be only meaningful for the special > case when the streams are always only created by one user space > process. Otherwise, if several processes do that, they are not aware > of each other and the number could be higher than they can actually > create, because other processes could have some streams created > already. Also the number of streams might not be fixed but depend on stream parameters, i.e. hardware can decode one hd or two sd streams ... cheers, Gerd --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org