Re: walk_pgd_range BUG: unable to handle page fault

[Tytus Rogalewski <tytanick@gmail.com>]

[-- Attachment #1.1: Type: text/plain, Size: 1496 bytes --]

Hi David,

This is strange but the issue stopped when i changed io_uring to threads.
Would that make any sense ?
We did also few other smaller things but honestly issues stopped.
Was it fixed or maybe Async IO could cause it ? (The qcow2 image is on fuse
mounting).

I am not certain but if that makes any sense, should i report this to
someone working on io_uring or it should have nothing to do with that bug ?

[image: CleanShot 2026-03-05 at 09.08.15@2x.png]

On all those kernels i seen no such bug for few weeks after changing async
io.

[image: CleanShot 2026-03-05 at 09.09.03@2x.png]

--

tel. 790 202 300

*Tytus Rogalewski*

Dolina Krzemowa 6A

83-010 Jagatowo

NIP: 9570976234


czw., 5 lut 2026 o 14:20 Tytus Rogalewski <tytanick@gmail.com> napisał(a):

> All my clients are renting GPUs so i can passthrough but i have no idea
> what they are doing there and it is not instant crash. it can work for few
> days under heavy load and then it happens. So even if i would di cpu only,
> i dont think it would give us anything.
>
> --
>
> tel. 790 202 300
>
> *Tytus Rogalewski*
>
> Dolina Krzemowa 6A
>
> 83-010 Jagatowo
>
> NIP: 9570976234
>
>
> czw., 5 lut 2026 o 13:57 David Hildenbrand (Arm) <david@kernel.org>
> napisał(a):
>
>> On 2/5/26 13:46, Tytus Rogalewski wrote:
>> > Hehe, i cant. I dont have any CPU only servers :)
>>
>> But you can just not passthrough a GPU to the VM?
>> --
>> Cheers,
>>
>> David
>>
>

[-- Attachment #1.2: Type: text/html, Size: 4425 bytes --]

[-- Attachment #2: CleanShot 2026-03-05 at 09.08.15@2x.png --]
[-- Type: image/png, Size: 26541 bytes --]

[-- Attachment #3: CleanShot 2026-03-05 at 09.09.03@2x.png --]
[-- Type: image/png, Size: 74642 bytes --]