Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-29 Thread Kirti Wankhede
On 5/29/2020 4:29 AM, Alex Williamson wrote: On Wed, 27 May 2020 09:48:22 +0100 "Dr. David Alan Gilbert" wrote: * Yan Zhao (yan.y.z...@intel.com) wrote: BTW, for viommu, the downtime data is as below. under the same network condition and guest memory size, and no running dirty data/memory

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-29 Thread Dr. David Alan Gilbert
* Alex Williamson (alex.william...@redhat.com) wrote: > On Thu, 28 May 2020 04:01:02 -0400 > Yan Zhao wrote: > > > > > > This is my understanding of the protocol as well, when the device is > > > > > running, pending_bytes might drop to zero if no internal state has > > > > > changed and may be

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-28 Thread Yan Zhao
On Thu, May 28, 2020 at 04:59:06PM -0600, Alex Williamson wrote: > On Wed, 27 May 2020 09:48:22 +0100 > "Dr. David Alan Gilbert" wrote: > > * Yan Zhao (yan.y.z...@intel.com) wrote: > > > BTW, for viommu, the downtime data is as below. under the same network > > > condition and guest memory size,

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-28 Thread Alex Williamson
On Wed, 27 May 2020 09:48:22 +0100 "Dr. David Alan Gilbert" wrote: > * Yan Zhao (yan.y.z...@intel.com) wrote: > > BTW, for viommu, the downtime data is as below. under the same network > > condition and guest memory size, and no running dirty data/memory produced > > by device. > > (1) viommu off

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-28 Thread Alex Williamson
On Thu, 28 May 2020 04:01:02 -0400 Yan Zhao wrote: > > > > This is my understanding of the protocol as well, when the device is > > > > running, pending_bytes might drop to zero if no internal state has > > > > changed and may be non-zero on the next iteration due to device > > > > activity.

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-28 Thread Yan Zhao
> > > This is my understanding of the protocol as well, when the device is > > > running, pending_bytes might drop to zero if no internal state has > > > changed and may be non-zero on the next iteration due to device > > > activity. When the device is not running, pending_bytes reporting zero >

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-27 Thread Dr. David Alan Gilbert
* Yan Zhao (yan.y.z...@intel.com) wrote: > On Tue, May 26, 2020 at 02:19:39PM -0600, Alex Williamson wrote: > > On Mon, 25 May 2020 18:50:54 +0530 > > Kirti Wankhede wrote: > > > > > On 5/25/2020 12:29 PM, Yan Zhao wrote: > > > > On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote:

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-27 Thread Yan Zhao
On Tue, May 26, 2020 at 02:19:39PM -0600, Alex Williamson wrote: > On Mon, 25 May 2020 18:50:54 +0530 > Kirti Wankhede wrote: > > > On 5/25/2020 12:29 PM, Yan Zhao wrote: > > > On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > > >> Hi folks, > > >> > > >> My impression is that

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-26 Thread Alex Williamson
On Mon, 25 May 2020 18:50:54 +0530 Kirti Wankhede wrote: > On 5/25/2020 12:29 PM, Yan Zhao wrote: > > On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > >> Hi folks, > >> > >> My impression is that we're getting pretty close to a workable > >> implementation here with v22 plus

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-25 Thread Kirti Wankhede
On 5/25/2020 12:29 PM, Yan Zhao wrote: On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: Hi folks, My impression is that we're getting pretty close to a workable implementation here with v22 plus respins of patches 5, 6, and 8. We also have a matching QEMU series and a

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-25 Thread Yan Zhao
On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > Hi folks, > > My impression is that we're getting pretty close to a workable > implementation here with v22 plus respins of patches 5, 6, and 8. We > also have a matching QEMU series and a proposal for a new i40e > consumer, as

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-21 Thread Kirti Wankhede
On 5/21/2020 12:34 PM, Yan Zhao wrote: On Thu, May 21, 2020 at 12:39:48PM +0530, Kirti Wankhede wrote: On 5/21/2020 10:38 AM, Yan Zhao wrote: On Wed, May 20, 2020 at 10:46:12AM -0600, Alex Williamson wrote: On Wed, 20 May 2020 19:10:07 +0530 Kirti Wankhede wrote: On 5/20/2020 8:25 AM,

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-21 Thread Kirti Wankhede
On 5/21/2020 12:34 PM, Yan Zhao wrote: On Thu, May 21, 2020 at 12:39:48PM +0530, Kirti Wankhede wrote: On 5/21/2020 10:38 AM, Yan Zhao wrote: On Wed, May 20, 2020 at 10:46:12AM -0600, Alex Williamson wrote: On Wed, 20 May 2020 19:10:07 +0530 Kirti Wankhede wrote: On 5/20/2020 8:25 AM,

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-21 Thread Yan Zhao
On Thu, May 21, 2020 at 12:39:48PM +0530, Kirti Wankhede wrote: > > > On 5/21/2020 10:38 AM, Yan Zhao wrote: > > On Wed, May 20, 2020 at 10:46:12AM -0600, Alex Williamson wrote: > > > On Wed, 20 May 2020 19:10:07 +0530 > > > Kirti Wankhede wrote: > > > > > > > On 5/20/2020 8:25 AM, Yan Zhao

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-21 Thread Kirti Wankhede
On 5/21/2020 10:38 AM, Yan Zhao wrote: On Wed, May 20, 2020 at 10:46:12AM -0600, Alex Williamson wrote: On Wed, 20 May 2020 19:10:07 +0530 Kirti Wankhede wrote: On 5/20/2020 8:25 AM, Yan Zhao wrote: On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: Hi folks, My

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-20 Thread Yan Zhao
On Wed, May 20, 2020 at 10:46:12AM -0600, Alex Williamson wrote: > On Wed, 20 May 2020 19:10:07 +0530 > Kirti Wankhede wrote: > > > On 5/20/2020 8:25 AM, Yan Zhao wrote: > > > On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > > >> Hi folks, > > >> > > >> My impression is that

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-20 Thread Alex Williamson
On Wed, 20 May 2020 19:10:07 +0530 Kirti Wankhede wrote: > On 5/20/2020 8:25 AM, Yan Zhao wrote: > > On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > >> Hi folks, > >> > >> My impression is that we're getting pretty close to a workable > >> implementation here with v22 plus

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-20 Thread Kirti Wankhede
On 5/20/2020 8:25 AM, Yan Zhao wrote: On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: Hi folks, My impression is that we're getting pretty close to a workable implementation here with v22 plus respins of patches 5, 6, and 8. We also have a matching QEMU series and a

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-19 Thread Yan Zhao
On Tue, May 19, 2020 at 10:58:04AM -0600, Alex Williamson wrote: > Hi folks, > > My impression is that we're getting pretty close to a workable > implementation here with v22 plus respins of patches 5, 6, and 8. We > also have a matching QEMU series and a proposal for a new i40e > consumer, as

Re: [PATCH Kernel v22 0/8] Add UAPIs to support migration for VFIO devices

2020-05-19 Thread Alex Williamson
Hi folks, My impression is that we're getting pretty close to a workable implementation here with v22 plus respins of patches 5, 6, and 8. We also have a matching QEMU series and a proposal for a new i40e consumer, as well as I assume GVT-g updates happening internally at Intel. I expect all of