Re: [PATCH v6 00/36] Multifd 🔀 device state transfer support with VFIO consumer

[Avihai Horon <avihaih@nvidia.com>]

On 05/03/2025 11:35, Cédric Le Goater wrote:
> External email: Use caution opening links or attachments
>
>
> On 3/5/25 10:33, Avihai Horon wrote:
>>
>> On 05/03/2025 11:29, Cédric Le Goater wrote:
>>> External email: Use caution opening links or attachments
>>>
>>>
>>> Hello,
>>>
>>> On 3/4/25 23:03, Maciej S. Szmigiero wrote:
>>>> From: "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>
>>>>
>>>> This is an updated v6 patch series of the v5 series located here:
>>>> https://lore.kernel.org/qemu-devel/cover.1739994627.git.maciej.szmigiero@oracle.com/ 
>>>>
>>>>
>>>> What this patch set is about?
>>>> Current live migration device state transfer is done via the main 
>>>> (single)
>>>> migration channel, which reduces performance and severally impacts the
>>>> migration downtime for VMs having large device state that needs to be
>>>> transferred during the switchover phase.
>>>>
>>>> Example devices that have such large switchover phase device state 
>>>> are some
>>>> types of VFIO SmartNICs and GPUs.
>>>>
>>>> This patch set allows parallelizing this transfer by using multifd 
>>>> channels
>>>> for it.
>>>> It also introduces new load and save threads per VFIO device for 
>>>> decoupling
>>>> these operations from the main migration thread.
>>>> These threads run on newly introduced generic (non-AIO) thread pools,
>>>> instantiated by the core migration core.
>>>
>>> I think we are ready to apply 1-33. Avihai, please take a look !
>>
>> Sure, will try to do it by EOW.
>
> Thanks,
>
>> When were you planning to apply?
>
> before EOW :)

Hehe, OK will go over it today/tomorrow.

Thanks.