From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance Date: Thu, 1 Oct 2015 18:46:43 +0300 Message-ID: <20151001184127-mutt-send-email-mst@redhat.com> References: <560CFB66.5050904@scylladb.com> <20151001124211-mutt-send-email-mst@redhat.com> <560D0413.5080401@scylladb.com> <20151001131754-mutt-send-email-mst@redhat.com> <560D0FE2.7010905@scylladb.com> <20151001135054-mutt-send-email-mst@redhat.com> <560D1705.30300@scylladb.com> <20151001142640-mutt-send-email-mst@redhat.com> <560D19C3.4060206@scylladb.com> <20151001080100.00eda700@urahara> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "dev@dpdk.org" , Avi Kivity To: Stephen Hemminger Return-path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id BF90E7E23 for ; Thu, 1 Oct 2015 17:46:48 +0200 (CEST) Content-Disposition: inline In-Reply-To: <20151001080100.00eda700@urahara> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On Thu, Oct 01, 2015 at 08:01:00AM -0700, Stephen Hemminger wrote: > The per-driver ring method is what netmap did. IIUC netmap has a standard format for descriptors, so was slower: it still had to do all networking in kernel (it only bypasses part of the networking stack), and to have a thread to translate between software and hardware formats. > The problem with that is that it forces infrastructure into already > complex network driver. It never was accepted. There were also still > security issues like time of check/time of use with the ring. Right, because people do care about security. -- MST