From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [RFC PATCH 00/17] virtual-bus Date: Fri, 03 Apr 2009 15:02:22 +0300 Message-ID: <49D5FACE.3010302@redhat.com> References: <20090402085253.GA29932@gondor.apana.org.au> <49D47F11.6070400@redhat.com> <49D5EBE1.8030200@redhat.com> <49D5ED11.2000800@redhat.com> <20090403111242.GA10200@gondor.apana.org.au> <49D5F6FC.5090401@redhat.com> <20090403114828.GA10465@gondor.apana.org.au> <49D5F8DA.20400@redhat.com> <20090403115546.GA10575@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Gerd Hoffmann , ghaskins@novell.com, anthony@codemonkey.ws, andi@firstfloor.org, linux-kernel@vger.kernel.org, agraf@suse.de, pmullaney@novell.com, pmorreale@novell.com, rusty@rustcorp.com.au, netdev@vger.kernel.org, kvm@vger.kernel.org To: Herbert Xu Return-path: In-Reply-To: <20090403115546.GA10575@gondor.apana.org.au> Sender: kvm-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Herbert Xu wrote: > On Fri, Apr 03, 2009 at 02:54:02PM +0300, Avi Kivity wrote: > >> It doesn't copy and queue the packet? We use O_NONBLOCK and poll() so >> we can tell when we can queue without blocking. >> > > Well netif_rx queues the packet, but netif_rx_ni is netif_rx plus > an immediate flush. > But it flushes the tap device, the packet still has to go through the bridge + real interface? Even if it's queued there, I want to know when the packet is on the wire, not on some random software or hardware queue in the middle. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.