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[83.35.20.18]) by smtp.gmail.com with ESMTPSA id y2sm40083086wrl.4.2019.07.25.03.42.18 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 25 Jul 2019 03:42:19 -0700 (PDT) References: <20190702121106.28374-1-slp@redhat.com> <87a7dwnxwj.fsf@redhat.com> <20190702220400.GA13923@localhost> <20190725055908-mutt-send-email-mst@kernel.org> User-agent: mu4e 1.2.0; emacs 26.2 From: Sergio Lopez To: Peter Maydell In-reply-to: Date: Thu, 25 Jul 2019 12:42:16 +0200 Message-ID: <87pnlymm47.fsf@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.221.67 Subject: Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type 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: Eduardo Habkost , maran.wilson@oracle.com, "Michael S. Tsirkin" , QEMU Developers , Gerd Hoffmann , Paolo Bonzini , Stefano Garzarella , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --=-=-= Content-Type: text/plain Peter Maydell writes: > On Thu, 25 Jul 2019 at 10:59, Michael S. Tsirkin wrote: >> OK so please start with adding virtio 1 support. Guest bits >> have been ready for years now. > > I'd still rather we just used pci virtio. If pci isn't > fast enough at startup, do something to make it faster... Actually, removing PCI (and ACPI), is one of the main ways microvm has to reduce not only boot time, but also the exposed surface and the general footprint. I think we need to discuss and settle whether using virtio-mmio (even if maintained and upgraded to virtio 1) for a new machine type is acceptable or not. Because if it isn't, we should probably just ditch the whole microvm idea and move to something else. 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