Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC
On Thu, Oct 22, 2015 at 07:01:01AM -0600, Alex Williamson wrote: > On Thu, 2015-10-22 at 15:32 +0300, Michael S. Tsirkin wrote: > > On Wed, Oct 21, 2015 at 01:20:27PM -0600, Alex Williamson wrote: > > > The trouble here is that the VF needs to be unplugged prior to the start > > > of migration because we can't do effective dirty page tracking while the > > > device is connected and doing DMA. > > > > That's exactly what patch 12/12 is trying to accomplish. > > > > I do see some problems with it, but I also suggested some solutions. > > I was replying to: > > > So... what would you expect service down wise for the following > > solution which is zero touch and I think should work for any VF > > driver: > > And then later note: > > "Here it's done via an enlightened guest driver." Oh, I misunderstood your intent. Sorry about that. So we are actually in agreement between us then. That's nice. -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC
On Thu, 2015-10-22 at 15:32 +0300, Michael S. Tsirkin wrote: > On Wed, Oct 21, 2015 at 01:20:27PM -0600, Alex Williamson wrote: > > The trouble here is that the VF needs to be unplugged prior to the start > > of migration because we can't do effective dirty page tracking while the > > device is connected and doing DMA. > > That's exactly what patch 12/12 is trying to accomplish. > > I do see some problems with it, but I also suggested some solutions. I was replying to: > So... what would you expect service down wise for the following > solution which is zero touch and I think should work for any VF > driver: And then later note: "Here it's done via an enlightened guest driver." -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC
On Thu, Oct 22, 2015 at 12:37:32AM +0800, Lan Tianyu wrote: > This patchset is to propose a new solution to add live migration support for > 82599 > SRIOV network card. > > Im our solution, we prefer to put all device specific operation into VF and > PF driver and make code in the Qemu more general. Adding code to VF driver makes sense. However, adding code to PF driver is problematic: PF and VF run within different environments, you can't assume PF and VF drivers are the same version. I guess that would be acceptable if these messages make it into the official intel spec, along with hardware registers. -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC
On Wed, Oct 21, 2015 at 01:20:27PM -0600, Alex Williamson wrote: > The trouble here is that the VF needs to be unplugged prior to the start > of migration because we can't do effective dirty page tracking while the > device is connected and doing DMA. That's exactly what patch 12/12 is trying to accomplish. I do see some problems with it, but I also suggested some solutions. -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
