From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Daniel P. Berrange" Subject: Re: reasons/requirements for some of patches/linux-2.6.16.29/* Date: Fri, 6 Oct 2006 13:09:48 +0100 Message-ID: <20061006120948.GA5580@redhat.com> References: <452620FF.76E4.0078.0@novell.com> <45262720.76E4.0078.0@novell.com> Reply-To: "Daniel P. Berrange" Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <45262720.76E4.0078.0@novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jan Beulich Cc: xen-devel@lists.xensource.com, Andrew Warfield List-Id: xen-devel@lists.xenproject.org On Fri, Oct 06, 2006 at 08:51:28AM +0100, Jan Beulich wrote: > >>> Keir Fraser 06.10.06 09:25 >>> > >On 6/10/06 8:25 am, "Jan Beulich" wrote: > > > >> Could anyone give a description (and reason it is needed for Xen, if that's > >> not obvious from the description) for each of > >> > >> blktap-aio-16_03_06.patch > > > >Not sure. Andrew Warfield or Julian Chesterfield probably will know. I would > >guess it's probably a backport of AIO changes from a more recent kernel, but > >I'm not certain about that. > > It's certainly not a backport (i.e. still needed in almost unchanged form in 2.6.18). > > >> net-gso-*.patch > > > >Backport of GSO patches from 2.6.17,18,... Done by Herbert Xu as part of his > >big netfront/back reworking and upgrade. This will mostly go away when we > >upgrade to 2.6.18. > > I understand that. But what I need is an understanding of why Xen needs this > right away. A significant performance increase. Without it, DomU -> Dom0 networking is far less than baremetal wirespeed; With it, DomU -> Dom0 networking has parity with baremetal wirespeed. Herbert's preso at the summit had a few more details http://xensource.com/files/summit_3/rdd-tso-xen.pdf Regards, Dan -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|