linux-kernel - Re: SCSI hotplug issues with UEFI VM with guest kernel >= 6.5

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Message-ID: <20231211161836.GA914318@bhelgaas>
Date:   Mon, 11 Dec 2023 10:18:36 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Fiona Ebner <f.ebner@...xmox.com>
Cc:     Igor Mammedov <imammedo@...hat.com>, linux-pci@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        bhelgaas@...gle.com, lenb@...nel.org, rafael@...nel.org,
        Thomas Lamprecht <t.lamprecht@...xmox.com>
Subject: Re: SCSI hotplug issues with UEFI VM with guest kernel >= 6.5

On Mon, Dec 11, 2023 at 03:53:46PM +0100, Fiona Ebner wrote:
> Am 11.12.23 um 15:12 schrieb Bjorn Helgaas:
> > On Mon, Dec 11, 2023 at 02:52:42PM +0100, Fiona Ebner wrote:
> >> Am 11.12.23 um 08:46 schrieb Igor Mammedov:
> >>> On Fri, 8 Dec 2023 16:47:23 +0100
> >>> Igor Mammedov <imammedo@...hat.com> wrote:
> >>>> On Thu, 7 Dec 2023 17:28:15 -0600
> >>>> Bjorn Helgaas <helgaas@...nel.org> wrote:
> >>>>
> >>>>> What's the actual symptom that this is broken?  All these log
> >>>>> fragments show the exact same assignments for BARs 0, 1, 4 and for the
> >>>>> bridge windows.
> >>
> >> The disk never shows up in /dev
> >>
> >>>>> I assume 0000:01:02.0 is the hot-added SCSI HBA, and 00:05.0 is a
> >>>>> bridge leading to it?
> >>>>>
> >>>>> Can you put the complete dmesg logs somewhere?  There's a lot of
> >>>>> context missing here.
> >>
> >> Is this still necessary with Igor being able to reproduce the issue?
> > 
> > Only if you want help resolving the problem.  I don't have time to
> > guess what interesting things might be missing and go back and forth
> > to get them.
> > 
> 
> I put the output of dmesg with my original QEMU commandline and kernel
> 6.7.0-rc3 here:
> 
> https://pastebin.com/UvpGAYf2

Thanks, I opened https://bugzilla.kernel.org/show_bug.cgi?id=218255
and attached this dmesg log there so this doesn't get lost or expired
from pastebin.com.

IIUC this is a log from when it fails.  Can you attach the
corresponding log when it works correctly?

Bjorn