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Fri, 29 Nov 2019 07:02:54 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id CB77D16E08; Fri, 29 Nov 2019 08:02:53 +0100 (CET) Date: Fri, 29 Nov 2019 08:02:53 +0100 From: Gerd Hoffmann To: =?utf-8?Q?Marc-Andr=C3=A9?= Lureau Subject: Re: [PATCH 0/2] RFC: add -mem-shared option Message-ID: <20191129070253.5hwksjrapomk434x@sirius.home.kraxel.org> References: <20191128141518.628245-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 In-Reply-To: <20191128141518.628245-1-marcandre.lureau@redhat.com> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: _NtBWrDROSC-Cm2sKCRw1g-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable 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: Paolo Bonzini , Richard Henderson , qemu-devel@nongnu.org, stefanha@redhat.com, Eduardo Habkost Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Thu, Nov 28, 2019 at 06:15:16PM +0400, Marc-Andr=E9 Lureau wrote: > Hi, >=20 > Setting up shared memory for vhost-user is a bit complicated from > command line, as it requires NUMA setup such as: m 4G -object > memory-backend-file,id=3Dmem,size=3D4G,mem-path=3D/dev/shm,share=3Don -nu= ma > node,memdev=3Dmem. >=20 > Instead, I suggest to add a -mem-shared option for non-numa setups, > that will make the -mem-path or anonymouse memory shareable. Is it an option to just use memfd by default (if available)? cheers, Gerd