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

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Message-ID: <DM6PR11MB311348977F72639F5345335C87759@DM6PR11MB3113.namprd11.prod.outlook.com>
Date:   Fri, 26 Aug 2022 18:41:47 +0000
From:   "Laba, SlawomirX" <slawomirx.laba@...el.com>
To:     Alex Williamson <alex.williamson@...hat.com>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "songmuchun@...edance.com" <songmuchun@...edance.com>,
        "mike.kravetz@...cle.com" <mike.kravetz@...cle.com>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: BUG: Virtual machine fails to start on 6.0-rc2

> -----Original Message-----
> From: Alex Williamson <alex.williamson@...hat.com>
> Sent: Friday, August 26, 2022 2:08 AM
> To: Laba, SlawomirX <slawomirx.laba@...el.com>
> Cc: linux-pci@...r.kernel.org; netdev@...r.kernel.org; linux-
> kernel@...r.kernel.org; regressions@...ts.linux.dev; bhelgaas@...gle.com;
> kvm@...r.kernel.org; linux-mm@...ck.org; songmuchun@...edance.com;
> mike.kravetz@...cle.com; Brandeburg, Jesse
> <jesse.brandeburg@...el.com>; Nguyen, Anthony L
> <anthony.l.nguyen@...el.com>; Andrew Morton <akpm@...ux-
> 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" <slawomirx.laba@...el.com> wrote:
> 
> > 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