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Message-ID: <62363899-d7aa-4f1c-abfa-1f87f0b6b43f@proxmox.com>
Date:   Tue, 12 Dec 2023 13:50:20 +0100
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Subject: Re: SCSI hotplug issues with UEFI VM with guest kernel >= 6.5
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To:     Igor Mammedov <imammedo@redhat.com>
Cc:     Bjorn Helgaas <helgaas@kernel.org>, linux-pci@vger.kernel.org,
        linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
        bhelgaas@google.com, lenb@kernel.org, rafael@kernel.org,
        Thomas Lamprecht <t.lamprecht@proxmox.com>
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 <20231212122608.1b4f75ce@imammedo.users.ipa.redhat.com>
From:   Fiona Ebner <f.ebner@proxmox.com>
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Am 12.12.23 um 12:26 schrieb Igor Mammedov:
> 
> it's not necessary, but it would help to find out what's going wrong faster.
> Otherwise we would need to fallback to debugging over email.
> Are you willing to help with testing/providing debug logs to track down
> the cause?.
> 

I submitted the dmesg logs in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=218255

> Though debug over email would be slow, so our best option is to revert
> offending patches until the cause if found/fixed.
> 
>>>>> Do you have to revert both cc22522fd55e2 and 40613da52b13f to make it
>>>>> work reliably?  If we have to revert something, reverting one would be
>>>>> better than reverting both.    
>>>>  
>>
>> Just reverting cc22522fd55e2 is not enough (and cc22522fd55e2 fixes
>> 40613da52b13f so I can't revert just 40613da52b13f).
> 
> With UEFI setup, it still works for me fine with current master.
> 
> Kernel 6.7.0-rc5-00014-g26aff849438c on an x86_64 (ttyS0)
> 

I also built from current master (still 26aff849438c) to verify and it's
still broken for me.

> 
> it still doesn't work with Fedora's 6.7.0-0.rc2.20231125git0f5cc96c367f.26.fc40.x86_64 kernel.
> However it's necessary to have -smp 4 for it to break,
> with -smp 1 it works fine as well.
> 

For me it's (always with build from current master):

-smp 1 -> it worked 5 times out of 5
-smp 2 -> it worked 3 times out of 5
-smp 4 -> it worked 0 times out of 5
-smp 8 -> it worked 0 times out of 5

Best Regards,
Fiona