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Thu, 2 Jan 2020 16:01:43 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 2x8gurqf3h-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Jan 2020 16:01:43 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 002G1eZL021919; Thu, 2 Jan 2020 16:01:40 GMT Received: from heatpipe (/67.180.143.163) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 02 Jan 2020 08:01:39 -0800 Date: Thu, 2 Jan 2020 08:01:36 -0800 From: Elena Ufimtseva To: Stefan Hajnoczi Subject: Re: [RFC v4 PATCH 00/49] Initial support of multi-process qemu - status update Message-ID: <20200102160136.GA20919@heatpipe> References: <20191210064716.GA6401@flaka> <20191213104116.GB1180977@stefanha-x1.localdomain> <20191216194655.GA5922@flaka> <20191217163316.GB1333385@stefanha-x1.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20191217163316.GB1333385@stefanha-x1.localdomain> User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9488 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001020140 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9488 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001020140 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by aserp2120.oracle.com id 002Fsd7S191640 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 141.146.126.78 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: "fam@euphon.net" , "john.g.johnson@oracle.com" , Swapnil Ingle , "mst@redhat.com" , "qemu-devel@nongnu.org" , "kraxel@redhat.com" , "jag.raman@oracle.com" , "quintela@redhat.com" , "armbru@redhat.com" , "kanth.ghatraju@oracle.com" , Felipe Franciosi , "thuth@redhat.com" , "ehabkost@redhat.com" , "konrad.wilk@oracle.com" , "dgilbert@redhat.com" , "liran.alon@oracle.com" , Thanos Makatos , "rth@twiddle.net" , "kwolf@redhat.com" , "berrange@redhat.com" , "mreitz@redhat.com" , "ross.lagerwall@citrix.com" , "marcandre.lureau@gmail.com" , "pbonzini@redhat.com" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Dec 17, 2019 at 04:33:16PM +0000, Stefan Hajnoczi wrote: > On Mon, Dec 16, 2019 at 07:57:32PM +0000, Felipe Franciosi wrote: > > > On 16 Dec 2019, at 20:47, Elena Ufimtseva wrote: > > > =EF=BB=BFOn Fri, Dec 13, 2019 at 10:41:16AM +0000, Stefan Hajnoczi = wrote: > > >> Is there a work-in-progress muser patch series you can post to sta= rt the > > >> discussion early? That way we can avoid reviewers like myself ask= ing > > >> you to make changes after you have invested a lot of time. > > >>=20 > > >=20 > > > Absolutely, that is our plan. At the moment we do not have the patc= hes > > > ready for the review. We have setup internally a milestone and will= be > > > sending that early version as a tarball after we have it completed. > > > Would be also a meeting something that could help us to stay on the= same > > > page? > >=20 > > Please loop us in if you so set up a meeting. > Hi Stefan And happy New Year to everyone! > There is a bi-weekly KVM Community Call that we can use for phone > discussions: >=20 > https://calendar.google.com/calendar/embed?src=3DdG9iMXRqcXAzN3Y4ZXZw= NzRoMHE4a3BqcXNAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ > Our team would like to join the call on Jan 14 and maybe talk over few th= ings. Felipe, will you and your team be joining as well? > Or we can schedule a one-off call at any time :). > Awesome! Thank you, we will use for sure this opportunity. Elena > Questions I've seen when discussing muser with people have been: >=20 > 1. Can unprivileged containers create muser devices? If not, this is a > blocker for use cases that want to avoid root privileges entirely. >=20 > 2. Does muser need to be in the kernel (e.g. slower to develop/ship, > security reasons)? A similar library could be implemented in > userspace along the lines of the vhost-user protocol. Although VMMs > would then need to use a new libmuser-client library instead of > reusing their VFIO code to access the device. >=20 > 3. Should this feature be Linux-only? vhost-user can be implemented on > non-Linux OSes... >=20 > Stefan