On Fri, Oct 08, 2021 at 01:23:52PM +, Parav Pandit wrote:
>
>
> > From: Michael S. Tsirkin
> > Sent: Friday, October 8, 2021 6:27 PM
>
> > > 2. A sriov VF virtio device for our case takes a lot lesser than this,
> > > but may
> > take anywhere between 10 msec to 250msec.
> > > This can hap
> From: Michael S. Tsirkin
> Sent: Friday, October 8, 2021 6:27 PM
> > 2. A sriov VF virtio device for our case takes a lot lesser than this, but
> > may
> take anywhere between 10 msec to 250msec.
> > This can happen on a firmware where user enabled 500 SR-IOV VFs.
> > Pci spec indicates tha
> From: Michael S. Tsirkin
> Sent: Friday, October 8, 2021 4:48 PM
>
> On Fri, Oct 08, 2021 at 10:51:02AM +, Parav Pandit wrote:
> > > That's why I ask: why do we bother? What's wrong with just waiting
> > > forever or until user gets tired of this and cancels with CTRL-C?
> >
> > Today, d
> From: Cornelia Huck
> Sent: Friday, October 8, 2021 5:18 PM
>
> On Fri, Oct 08 2021, "Michael S. Tsirkin" wrote:
>
> > On Fri, Oct 08, 2021 at 10:59:02AM +, Parav Pandit wrote:
> >> It may be even a pre-boot environment where 100msec or 10msec may be
> too short interval as other extre
> From: Michael S. Tsirkin
> Sent: Friday, October 8, 2021 4:52 PM
>
> On Fri, Oct 08, 2021 at 10:59:02AM +, Parav Pandit wrote:
> > It may be even a pre-boot environment where 100msec or 10msec may be
> too short interval as other extreme of VM boot time example.
>
> I don't really know w
> From: Michael S. Tsirkin
> Sent: Friday, October 8, 2021 4:14 PM
>
> On Thu, Oct 07, 2021 at 03:42:24AM +, Parav Pandit wrote:
> > > There's no reason for a driver to choose any value - it has nothing else
> > > to
> do.
> > >
> > At least for the devices that we are seeing, driver choos
> From: Michael S. Tsirkin
> Sent: Friday, October 8, 2021 3:42 PM
> > When a device migrates to destination, it starts from where the device
> > left off on the source side. So yes, destination side, device must be
> > usable (out of reset), and after that its current state will be
> > overw
> From: Cornelia Huck
> Sent: Friday, October 8, 2021 3:31 PM
>
> On Thu, Oct 07 2021, Parav Pandit wrote:
>
> >> From: Cornelia Huck
> >> Sent: Thursday, October 7, 2021 9:41 PM On Thu, Oct 07 2021, Parav
> >> Pandit wrote:
> >>
> >> >> From: Michael S. Tsirkin
> >> >> Sent: Thursday, Oct
On Fri, Oct 08, 2021 at 12:12:35PM +, Parav Pandit wrote:
>
>
> > From: Cornelia Huck
> > Sent: Friday, October 8, 2021 5:18 PM
> >
> > On Fri, Oct 08 2021, "Michael S. Tsirkin" wrote:
> >
> > > On Fri, Oct 08, 2021 at 10:59:02AM +, Parav Pandit wrote:
> > >> It may be even a pre-boot
On Fri, Oct 08 2021, "Michael S. Tsirkin" wrote:
> On Fri, Oct 08, 2021 at 10:59:02AM +, Parav Pandit wrote:
>> It may be even a pre-boot environment where 100msec or 10msec may be too
>> short interval as other extreme of VM boot time example.
>
> I don't really know what this means. We are
On Fri, Oct 08, 2021 at 10:59:02AM +, Parav Pandit wrote:
> It may be even a pre-boot environment where 100msec or 10msec may be too
> short interval as other extreme of VM boot time example.
I don't really know what this means. We are talking about how long
it takes device to calm down and s
On Fri, Oct 08, 2021 at 10:51:02AM +, Parav Pandit wrote:
> > That's why I ask: why do we bother? What's wrong with just waiting forever
> > or
> > until user gets tired of this and cancels with CTRL-C?
>
> Today, device removal of the device gets stuck for the device which didn't
> finish t
On Thu, Oct 07, 2021 at 03:42:24AM +, Parav Pandit wrote:
> > There's no reason for a driver to choose any value - it has nothing else to
> > do.
> >
> At least for the devices that we are seeing, driver choosing a default value
> of 2 to 3 minutes is good enough and of course useful.
Well I
On Thu, Oct 07, 2021 at 05:58:09PM +, Parav Pandit wrote:
> > >> > > Third how about making e.g. 0 a special value meaning no limit
> > >> > > wait
> > >> forever?
> > >> > The whole idea is to have some finite/deterministic behavior,
> > >>
> > >> I guess I'm being dense, I just don't yet unde
On Thu, Oct 07 2021, Parav Pandit wrote:
>> From: Cornelia Huck
>> Sent: Thursday, October 7, 2021 9:41 PM
>> On Thu, Oct 07 2021, Parav Pandit wrote:
>>
>> >> From: Michael S. Tsirkin
>> >> Sent: Thursday, October 7, 2021 2:23 AM On Wed, Oct 06, 2021 at
>> >> 04:11:19PM +, Parav Pandit w
The I2C protocol allows zero-length requests with no data, like the
SMBus Quick command, where the command is inferred based on the
read/write flag itself.
In order to allow such a request, allocate another bit,
VIRTIO_I2C_FLAGS_M_RD(1), in the flags to pass the request type, as read
or write. Thi
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