linux-kernel - RE: VFs go missing with latest kernel

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Date:	Wed, 1 Feb 2012 01:03:08 +0000
From:	"Rose, Gregory V" <gregory.v.rose@...el.com>
To:	David Ahern <daahern@...co.com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: RE: VFs go missing with latest kernel

> -----Original Message-----
> From: David Ahern [mailto:daahern@...co.com]
> Sent: Tuesday, January 31, 2012 4:50 PM
> To: Rose, Gregory V
> Cc: LKML
> Subject: Re: VFs go missing with latest kernel
> 
> On 01/31/2012 05:43 PM, Rose, Gregory V wrote:
> >>
> >> Back to the missing VF problem: reverting the patch I mentioned before
> >> and my VM boots up fine with the even-numbered VFs assigned to it.
> >
> > OK, thanks... I was staring at the dmesg output you sent me and it is
> odd because the even numbered VFs that go missing are there when you set
> their MAC addresses.  See output below the dotted line after my reply.
> 
> Ah, I think I confused you. The VFs for the first 2 ports (ie., the
> first 14 VFs) are seen fine; I only showed the VFs for the second 2
> ports -- which are missing the even number.
> 
> So, in summary I am missing 7 VFs all associated with the even numbers
> on the last ports of a quad port card.

OK, thanks for the clarification.  But it still shows that all 28 VFs exist while their MAC addresses are being set but then at some point subsequent to that 7 of them on the port belonging to PCI device 07:00.0 disappear for some reason.

I'll see what I can find.

Thanks,

- Greg

> 
> David
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