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

["Cédric Le Goater" <clg@redhat.com>]

On 3/5/25 10:29, Cédric Le Goater wrote:
> 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 !

Applied to vfio-next with changes for documentation.

Avihai, I will wait for your input before sending a PR.

Thanks,

C.