On 8/17/22 01:15, DERUMIER, Alexandre wrote:
Le 9/08/22 à 10:39, Dominik Csapak a écrit :
On 8/9/22 09:59, DERUMIER, Alexandre wrote:
Le 26/07/22 à 08:55, Dominik Csapak a écrit :
so maybe someone can look at that and give some feedback?
my idea there would be to allow multiple device mappings per node
(instead of one only) and the qemu code would select one automatically
Hi Dominik,
do you want to create some kind of pool of pci devices in your ""add
cluster-wide hardware device mapping" patches series ?
Maybe in hardwaremap, allow to define multiple pci address on same node ?
Then, for mdev, look if a mdev already exist in 1 of the device.
If not, try to create the mdev if 1 device, if it's failing (max
number of mdev reached), try to create mdev on the other device,...
if not mdev, choose a pci device in the pool not yet detached from host.
yes i plan to do this in my next iteration of the mapping series
(basically what you describe)
Hi, sorry to be late.
my (rough) idea:
have a list of pci paths in mapping (e.g. 01:00.0;01:00.4;...)
(should be enough, i don't think grouping unrelated devices (different
vendor/product) makes much sense?)
yes, that's enough for me. we don't want to mix unrelated devices.
BTW, I'm finally able to do live migration with nvidia mdev vgpu. (need
to compile the nvidia vfio driver with an option to enable it + add
"-device vfio-pci,x-enable-migration=on,..."
nice (what flag do you need on the driver install? i did not find it)
i'll see if i can test that on a single card (only have one here)
So, maybe adding a "livemigrate" flag on the hardwaremap could be great :)
it's probably better suited for the hostpci setting in the qemu config,
since that's the place we need it
Could be usefull for stateless usb device, like usb dongle,where we
could unplug usb/livemigrate/replug usb.
also probably better suited for the usbX setting
but those can be done after (some version of) this series
is applied
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