Re: [Xen-devel] [PATCH 1/2] libxl: Wait until QEMU removed the device before tearing it down

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Friday, November 14, 2014, 10:38:11 PM, you wrote:

> On 11/14/2014 04:20 PM, Sander Eikelenboom wrote:
>> Friday, November 14, 2014, 10:09:04 PM, you wrote:
>>
>>
>>> I don't know about detach but I apparently can't even properly attach a
>>> second device --- I get complaints about it already being in xenstore.
>>> But device does show up in the guest.
>>> And then I can't remove it because, well, it's not in xenstore.
>>> Maybe it has something to do with the fact that both devices are virtual
>>> functions of the same physical device. I might look at this sometime
>>> next week.
>> Ah .. virtual function as in virtual functions of a SR-IOV NIC ?
>> or the functions of a multi-function device (the later ends up as separate 
>> devices
>> in a HVM guest (assuming you use qemu-xen and not qemu-traditional)).

> Virtual functions of an SR-IOV NIC. I'd think they should show up as separate 
> devices in xenstore. (And they do show up as separate devices in the guest)
> And qemu-xen.

Hmm i thought SR-IOV was in some aspects a special case, also thought i had 
seen some conversation between Jan and Konrad about SR-IOV and device removal
the last week(s). But i don't have a SR-IOV capable NIC, so also no experiences 
related to that.

> -boris




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