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: <716f186d-924a-4f2c-828a-2080729abfe9@oracle.com>
Date: Wed, 12 Feb 2025 20:42:01 +0530
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Salvatore Bonaccorso <carnil@...ian.org>
Cc: Juergen Gross <jgross@...e.com>,
        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

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@suse.com/

This has some fixes, but not landed upstream yet.

Thanks,
Harshit

> Regards,
> Salvatore