On Thu, 2014-11-13 at 18:48 +0100, Jiri Slaby wrote: > On 11/12/2014, 10:03 PM, Ben Hutchings wrote: > > On Wed, 2014-11-12 at 10:12 +0900, Greg Kroah-Hartman wrote: > >> 3.17-stable review patch. If anyone has any objections, please > >> let me know. > >> > >> ------------------ > >> > >> From: Ben Hutchings > >> > >> [ Upstream commit 3d0ad09412ffe00c9afa201d01effdb6023d09b4 ] > >> > >> IPv6 does not allow fragmentation by routers, so there is no > >> fragmentation ID in the fixed header. UFO for IPv6 requires the > >> ID to be passed separately, but there is no provision for this in > >> the virtio net protocol. > >> > >> Until recently our software implementation of UFO/IPv6 generated > >> a new ID, but this was a bug. Now we will use ID=0 for any > >> UFO/IPv6 packet passed through a tap, which is even worse. > >> > >> Unfortunately there is no distinction between UFO/IPv4 and v6 > >> features, so disable UFO on taps and virtio_net completely until > >> we have a proper solution. > > [...] > > > > Please drop this patch for 3.14 and 3.17. It causes problems for > > migration of VMs and we're probably going to revert part of this. > > The following patch ("drivers/net, ipv6: Select IPv6 fragment > > idents for virtio UFO packets") might no longer apply, in which > > case you can drop that as well until we have this sorted out > > upstream. > > The same holds for 3.12, I suppose? Right. Ben. -- Ben Hutchings friends: People who know you well, but like you anyway.