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From: Alexander Duyck <alexander.duyck@gmail.com>
To: "Lan, Tianyu" <tianyu.lan@intel.com>,
	bhelgaas@google.com, carolyn.wyborny@intel.com,
	donald.c.skidmore@intel.com, eddie.dong@intel.com,
	nrupal.jani@intel.com, yang.z.zhang@intel.com, agraf@suse.de,
	kvm@vger.kernel.org, pbonzini@redhat.com, qemu-devel@nongnu.org,
	emil.s.tantilov@intel.com, intel-wired-lan@lists.osuosl.org,
	jeffrey.t.kirsher@intel.com, jesse.brandeburg@intel.com,
	john.ronciak@intel.com, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org, matthew.vick@intel.com,
	mitch.a.williams@intel.com, netdev@vger.kernel.org,
	shannon.nelson@intel.com
Subject: Re: [RFC Patch 05/12] IXGBE: Add new sysfs interface of "notify_vf"
Date: Sat, 24 Oct 2015 23:03:04 -0700	[thread overview]
Message-ID: <562C7098.4030406@gmail.com> (raw)
In-Reply-To: <562BA729.10903@intel.com>

On 10/24/2015 08:43 AM, Lan, Tianyu wrote:
>
> On 10/22/2015 4:52 AM, Alexander Duyck wrote:
>> Also have you even considered the MSI-X configuration on the VF?  I
>> haven't seen anything anywhere that would have migrated the VF's MSI-X
>> configuration from BAR 3 on one system to the new system.
>
> MSI-X migration is done by Hypervisor(Qemu).
> Following link is my Qemu patch to do that.
> http://marc.info/?l=kvm&m=144544706530484&w=2

I really don't like the idea of trying to migrate the MSI-X across from 
host to host while it is still active.  I really think Qemu shouldn't be 
moving this kind of data over in a migration.

I think that having the VF do a suspend/resume is the best way to go.  
Then it simplifies things as all you have to deal with is the dirty page 
tracking for the Rx DMA and you should be able to do this without making 
things too difficult.

- Alex

  reply	other threads:[~2015-10-25  6:03 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-21 16:37 [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 01/12] PCI: Add virtfn_index for struct pci_device Lan Tianyu
2015-10-21 18:07   ` Alexander Duyck
2015-10-24 14:46     ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 02/12] IXGBE: Add new mail box event to restore VF status in the PF driver Lan Tianyu
2015-10-21 20:34   ` Alexander Duyck
2015-10-21 16:37 ` [RFC Patch 03/12] IXGBE: Add sysfs interface for Qemu to migrate " Lan Tianyu
2015-10-21 20:45   ` Alexander Duyck
2015-10-25  7:21     ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 04/12] IXGBE: Add ixgbe_ping_vf() to notify a specified VF via mailbox msg Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 05/12] IXGBE: Add new sysfs interface of "notify_vf" Lan Tianyu
2015-10-21 20:52   ` Alexander Duyck
2015-10-22 12:51     ` Michael S. Tsirkin
2015-10-24 15:43     ` Lan, Tianyu
2015-10-25  6:03       ` Alexander Duyck [this message]
2015-10-25  6:45         ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 06/12] IXGBEVF: Add self emulation layer Lan Tianyu
2015-10-21 20:58   ` Alexander Duyck
2015-10-22 12:50     ` [Qemu-devel] " Michael S. Tsirkin
2015-10-22 15:50       ` Alexander Duyck
2015-10-21 16:37 ` [RFC Patch 07/12] IXGBEVF: Add new mail box event for migration Lan Tianyu
2015-10-21 16:37 ` [RFC Patch 08/12] IXGBEVF: Rework code of finding the end transmit desc of package Lan Tianyu
2015-10-21 21:14   ` Alexander Duyck
2015-10-24 16:12     ` Lan, Tianyu
2015-10-22 12:58   ` Michael S. Tsirkin
2015-10-24 16:08     ` Lan, Tianyu
2015-10-21 16:37 ` [RFC Patch 09/12] IXGBEVF: Add live migration support for VF driver Lan Tianyu
2015-10-21 21:48   ` Alexander Duyck
2015-10-22 12:46   ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 10/12] IXGBEVF: Add lock to protect tx/rx ring operation Lan Tianyu
2015-10-21 21:55   ` Alexander Duyck
2015-10-22 12:40   ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 11/12] IXGBEVF: Migrate VF statistic data Lan Tianyu
2015-10-22 12:36   ` Michael S. Tsirkin
2015-10-21 16:37 ` [RFC Patch 12/12] IXGBEVF: Track dma dirty pages Lan Tianyu
2015-10-22 12:30   ` Michael S. Tsirkin
2015-10-21 18:45 ` [RFC Patch 00/12] IXGBE: Add live migration support for SRIOV NIC Or Gerlitz
2015-10-21 19:20   ` Alex Williamson
2015-10-21 23:26     ` Alexander Duyck
2015-10-22 12:32     ` [Qemu-devel] " Michael S. Tsirkin
2015-10-22 13:01       ` Alex Williamson
2015-10-22 13:06         ` Michael S. Tsirkin
2015-10-22 15:58     ` Or Gerlitz
2015-10-22 16:17       ` Alex Williamson
2015-10-22 12:55 ` [Qemu-devel] " Michael S. Tsirkin
2015-10-23 18:36 ` Alexander Duyck
2015-10-23 19:05   ` Alex Williamson
2015-10-23 20:01     ` Alexander Duyck
2015-10-26  5:36   ` Lan Tianyu
2015-10-26 15:03     ` Alexander Duyck
2015-10-29  6:12       ` Lan Tianyu
2015-10-29  6:58         ` Alexander Duyck
2015-10-29  8:33           ` Lan Tianyu
2015-10-29 16:17             ` Alexander Duyck
2015-10-30  2:41               ` Lan Tianyu
2015-10-30 18:04                 ` Alexander Duyck

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