[Bug 47451] need to re-load driver in guest to make a hot-plug VF work

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https://bugzilla.kernel.org/show_bug.cgi?id=47451





--- Comment #2 from Jay Ren <yongjie.ren@xxxxxxxxx>  2012-09-20 03:36:31 ---
(In reply to comment #1)
> The steps to reproduce don't indicate what you've done in the host to prepare
> the device.  Is igbvf loaded in the host?  
No, I don't load igbvf driver in host.

>Is the vf attached to igbvf or pci-stub or nothing?  
VF is attached to 'pci-stub' in host.

>Can we narrow down the kvm.git commit range at all?  The
> one provided is over 12k commits covering v3.4-rc3 to v3.5-rc6.  Thanks
I did more testing.
Do you remember the bug #43328 ( VT-d/SR-IOV totally doesn't work in guest)?
Just use your fix commit for that bug, I'll meet this hot-plug issue.
Is there a chance your patch fixed one bug but introduced another one? :)

commit a76beb14123a69ca080f5a5425e28b786d62318d
Author: Alex Williamson <alex.williamson@xxxxxxxxxx>
Date: Mon Jul 9 10:53:22 2012 -0600

    KVM: Fix device assignment threaded irq handler

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