netdev - Re: [PATCH V8 mlx5-next 09/15] vfio: Define device migration protocol v2

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Message-ID: <20220223024735.GL10061@nvidia.com>
Date:   Tue, 22 Feb 2022 22:47:35 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Yishai Hadas <yishaih@...dia.com>, bhelgaas@...gle.com,
        saeedm@...dia.com, linux-pci@...r.kernel.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org, kuba@...nel.org, leonro@...dia.com,
        kwankhede@...dia.com, mgurtovoy@...dia.com, maorg@...dia.com,
        cohuck@...hat.com, ashok.raj@...el.com, kevin.tian@...el.com,
        shameerali.kolothum.thodi@...wei.com
Subject: Re: [PATCH V8 mlx5-next 09/15] vfio: Define device migration
 protocol v2

On Tue, Feb 22, 2022 at 06:09:34PM -0700, Alex Williamson wrote:

> So if/when we were to support this, we might use a different SET_STATE
> feature ioctl that allows the user to specify a deadline and we'd use
> feature probing or a flag on the migration feature for userspace to
> discover this?  I'd be ok with that, I just want to make sure we have
> agreeable options to support it.  Thanks,

I think we'd just make the set_state struct longer and add a cap flag
for deadline?

Jason