RE: BUG: Virtual machine fails to start on 6.0-rc2

-----Original Message-----
From: Alex Williamson <redacted>
Sent: Friday, August 26, 2022 2:08 AM
To: Laba, SlawomirX <redacted>
Cc: linux-pci@vger.kernel.org; netdev@vger.kernel.org; linux-
kernel@vger.kernel.org; regressions@lists.linux.dev; bhelgaas@google.com;
kvm@vger.kernel.org; linux-mm@kvack.org; songmuchun@bytedance.com;
mike.kravetz@oracle.com; Brandeburg, Jesse
[off-list ref]; Nguyen, Anthony L
[off-list ref]; Andrew Morton <akpm@linux-
foundation.org>
Subject: Re: BUG: Virtual machine fails to start on 6.0-rc2

On Thu, 25 Aug 2022 23:42:47 +0000
"Laba, SlawomirX" [off-list ref] wrote:

quoted

We were testing the changes for our VF devices and noticed an issue
when starting VMs with passthrough VFs. We then moved back to mainline
kernel and reproduced the issue on 6.0-rc2

We noticed that the startup of the KVM hangs.

Steps to reproduce:
Create a VF from the PF interface.
Configure VM XML with the VF PCI.
Start the KVM.

To isolate the issue we moved back to kernel 5.19 and it was working
fine.

Working tag v5.19
Tested failing commit 4c612826bec1

Does this resolve the issue?

https://lore.kernel.org/all/166015037385.760108.16881097713975517242.stgit
@omen/

This is currently in Andrew's mm-hotfixes-unstable branch and we're waiting
for it to be merged to mainline.  Thanks,

Alex

With the patch you linked, the issue is gone.

Thanks,
Slawek