Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423099Ab2JaPGY (ORCPT ); Wed, 31 Oct 2012 11:06:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1534 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932631Ab2JaPGU (ORCPT ); Wed, 31 Oct 2012 11:06:20 -0400 Date: Wed, 31 Oct 2012 17:05:47 +0200 From: Gleb Natapov To: Asias He Cc: Avi Kivity , Pekka Enberg , richard -rw- weinberger , Ingo Molnar , Christoph Hellwig , Dave Airlie , Borislav Petkov , Stephen Rothwell , Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, Sasha Levin , Cyrill Gorcunov Subject: Re: [GIT PULL] Linux KVM tool for v3.7-rc0 Message-ID: <20121031150547.GE25650@redhat.com> References: <20121020180436.c42b7325431fe87104b008fa@canb.auug.org.au> <20121020181425.GA11191@liondog.tnic> <20121021110329.GA7024@infradead.org> <20121021125933.GC19535@gmail.com> <508510C3.2020901@redhat.com> <20121022101645.GL29310@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1646 Lines: 38 On Tue, Oct 23, 2012 at 10:20:34AM +0800, Asias He wrote: > On Mon, Oct 22, 2012 at 6:16 PM, Gleb Natapov wrote: > > On Mon, Oct 22, 2012 at 11:24:19AM +0200, Avi Kivity wrote: > >> On 10/21/2012 05:39 PM, Pekka Enberg wrote: > >> > > >> > On Sun, Oct 21, 2012 at 5:02 PM, richard -rw- weinberger > >> > wrote: > >> >> qemu supports all these features. > >> >> E.g. to access the host fs use: > >> >> qemu ... \ > >> >> -fsdev local,security_model=passthrough,id=fsdev-root,path=/your/root/,readonly > >> >> \ > >> >> -device virtio-9p-pci,id=fs-root,fsdev=fsdev-root,mount_tag=rootshare > >> > > >> > IIRC, QEMU uses SLIRP non-root zero-config networking which is much > >> > more limited than what LKVM offers out of the box. > >> > >> Curious, what are the differences? > >> > > Me too, especially as we discussed replacing SLIRP with lkvm code for > > userspace networking and decided (for reasons I do not remember) that it > > lacks futures SLIRP has. Was it host port redirection? > > Yes. Currently, there is no host to guest port forward support in lkvm. > However, it's faster than slirp. > e.g. tcp bandwidth in a 100Mb/s environment > lkvm's userspace networking ~90Mb/s v.s qemu's slirp ~10Mb/s > This is not entirely slirp fault BTW. If you run QEMU with "-usbdevice tablet", slirp bandwidth goes up to 80-90Mb too. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/