linux-kernel - Re: [6.1.y] Regression from b1e6e80a1b42 ("xen/swiotlb: add alignment check for dma buffers") when booting with Xen and mpt3sas_cm0 _scsih

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Message-ID: <74e74dde-0703-4709-96b8-e1615d40f19c@suse.com>
Date: Sat, 15 Feb 2025 14:39:46 +0100
From: Jürgen Groß <jgross@...e.com>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
 Salvatore Bonaccorso <carnil@...ian.org>,
 Stefano Stabellini <sstabellini@...nel.org>, Sasha Levin
 <sashal@...nel.org>, Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
 xen-devel@...ts.xenproject.org, iommu@...ts.linux.dev,
 Radoslav Bodó <radoslav.bodo@...lileo.cz>,
 regressions@...ts.linux.dev, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org, Harshvardhan Jha <harshvardhan.j.jha@...cle.com>,
 Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [6.1.y] Regression from b1e6e80a1b42 ("xen/swiotlb: add alignment
 check for dma buffers") when booting with Xen and mpt3sas_cm0 _scsih_probe
 failures

On 15.02.25 13:34, Greg KH wrote:
> On Sat, Feb 15, 2025 at 12:47:57PM +0100, Jürgen Groß wrote:
>> On 12.02.25 16:12, Harshit Mogalapalli wrote:
>>> Hi Salvatore,
>>>
>>> On 12/02/25 00:56, Salvatore Bonaccorso wrote:
>>>> Hi Harshit,
>>>>
>>>> On Sun, Feb 09, 2025 at 01:45:38AM +0530, Harshit Mogalapalli wrote:
>>>>> Hi Salvatore,
>>>>>
>>>>> On 08/02/25 21:26, Salvatore Bonaccorso wrote:
>>>>>> Hi Juergen, hi all,
>>>>>>
>>>>>> Radoslav Bodó reported in Debian an issue after updating our kernel
>>>>>> from 6.1.112 to 6.1.115. His report in full is at:
>>>>>>
>>>>>> https://bugs.debian.org/1088159
>>>>>>
>>>>>
>>>>> Note:
>>>>> We have seen this on 5.4.y kernel: More details here:
>>>>> https://lore.kernel.org/all/9dd91f6e-1c66-4961-994e-dbda87d69dad@oracle.com/
>>>>
>>>> Thanks for the pointer, so looking at that thread I suspect the three
>>>> referenced bugs in Debian are in the end all releated. We have one as
>>>> well relating to the megasas_sas driver, this one for the mpt3sas
>>>> driver and one for the i40e driver).
>>>>
>>>> AFAICS, there is not yet a patch which has landed upstream which I can
>>>> redirect to a affected user to test?
>>>>
>>>
>>> Konrad pointed me at this thread: https://lore.kernel.org/
>>> all/20250211120432.29493-1-jgross@...e.com/
>>>
>>> This has some fixes, but not landed upstream yet.
>>
>> Patches are upstream now. In case you still experience any problems, please
>> speak up.
> 
> What specific commits should be backported here?

Those are:

e93ec87286bd1fd30b7389e7a387cfb259f297e3
85fcb57c983f423180ba6ec5d0034242da05cc54


Juergen

> 
> thanks,
> 
> greg k-h


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