linux-kernel - RE: [RFC PATCH 5/5] nvme-vfio: Add a document for the NVMe device

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Date:   Fri, 9 Dec 2022 02:05:21 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Christoph Hellwig <hch@....de>, Jason Gunthorpe <jgg@...pe.ca>
CC:     "Rao, Lei" <lei.rao@...el.com>,
        "kbusch@...nel.org" <kbusch@...nel.org>,
        "axboe@...com" <axboe@...com>, "kch@...dia.com" <kch@...dia.com>,
        "sagi@...mberg.me" <sagi@...mberg.me>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>,
        "cohuck@...hat.com" <cohuck@...hat.com>,
        "yishaih@...dia.com" <yishaih@...dia.com>,
        "shameerali.kolothum.thodi@...wei.com" 
        <shameerali.kolothum.thodi@...wei.com>,
        "mjrosato@...ux.ibm.com" <mjrosato@...ux.ibm.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "Dong, Eddie" <eddie.dong@...el.com>,
        "Li, Yadong" <yadong.li@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Wilk, Konrad" <konrad.wilk@...cle.com>,
        "stephen@...eticom.com" <stephen@...eticom.com>,
        "Yuan, Hang" <hang.yuan@...el.com>
Subject: RE: [RFC PATCH 5/5] nvme-vfio: Add a document for the NVMe device

> From: Christoph Hellwig <hch@....de>
> Sent: Tuesday, December 6, 2022 9:09 PM
> 
> 
> > I don't think we know enough about this space at the moment to fix a
> > specification to one path or the other, so I hope the TPAR will settle
> > on something that can support both models in SW and people can try
> > things out.
> 
> I've not seen anyone from Intel actually contributing to the live
> migration TPAR, which is almost two month old by now.

Not a NVMe guy but obviously Intel should join. I have forwarded this
to internal folks to check the actual status.

And I also asked them to prepare a document explaining how this
opaque cmd actually works to address your concerns.