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: <6d7ed6bf-f8ad-438a-a368-724055b4f04c@suse.com>
Date: Sat, 15 Feb 2025 12:47:57 +0100
From: Jürgen Groß <jgross@...e.com>
To: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
 Salvatore Bonaccorso <carnil@...ian.org>
Cc: 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 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.


Juergen

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