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Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for i
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver |
Date: |
Wed, 25 Nov 2015 14:28:05 +0200 |
On Wed, Nov 25, 2015 at 01:39:32PM +0800, Lan Tianyu wrote:
> On 2015年11月25日 05:20, Michael S. Tsirkin wrote:
> > I have to say, I was much more interested in the idea
> > of tracking dirty memory. I have some thoughts about
> > that one - did you give up on it then?
>
> No, our finial target is to keep VF active before doing
> migration and tracking dirty memory is essential. But this
> seems not easy to do that in short term for upstream. As
> starters, stop VF before migration.
Frankly, I don't really see what this short term hack buys us,
and if it goes in, we'll have to maintain it forever.
Also, assuming you just want to do ifdown/ifup for some reason, it's
easy enough to do using a guest agent, in a completely generic way.
> After deep thinking, the way of stopping VF still needs tracking
> DMA-accessed dirty memory to make sure the received data buffer
> before stopping VF migrated. It's easier to do that via dummy writing
> data buffer when receive packet.
>
>
> --
> Best regards
> Tianyu Lan
- [Qemu-devel] [RFC PATCH V2 0/3] IXGBE/VFIO: Add live migration support for SRIOV NIC, Lan Tianyu, 2015/11/24
- [Qemu-devel] [RFC PATCH V2 1/3] VFIO: Add new ioctl cmd VFIO_GET_PCI_CAP_INFO, Lan Tianyu, 2015/11/24
- [Qemu-devel] [RFC PATCH V2 2/3] PCI: Add macros for faked PCI migration capability, Lan Tianyu, 2015/11/24
- [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Lan Tianyu, 2015/11/24
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Michael S. Tsirkin, 2015/11/24
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Alexander Duyck, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Lan Tianyu, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Lan, Tianyu, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Michael S. Tsirkin, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Alexander Duyck, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Michael S. Tsirkin, 2015/11/25
- Re: [Qemu-devel] [RFC PATCH V2 3/3] Ixgbevf: Add migration support for ixgbevf driver, Alexander Duyck, 2015/11/25
Re: [Qemu-devel] [RFC PATCH V2 0/3] IXGBE/VFIO: Add live migration support for SRIOV NIC, Alexander Duyck, 2015/11/24