Re: walk_pgd_range BUG: unable to handle page fault

["David Hildenbrand (Arm)" <david@kernel.org>]

On 3/9/26 21:42, Tytus Rogalewski wrote:
> Hi,
> 
> Well it seemed "like mem leak" but honestly it was my bad assumption i
> guess.
> 
> And does it correlate with io_uring somehow ?

Not really :/

> Because i have no such issues when using threads mode in proxmox with
> network drive that is on fuse.
> Could be that triggered perhaps when someone was writing hard to his
> disk and that would cause other fuse drives to hung for few secs and
> that would trigger that BUG ?

I'm rather wondering whether something involving io_uring could make the
kernel reschedule more often, possibly in the race window that the issue
I linked describes.

> And using threads somehow fixes that issue ? Does that make any sense ?

Maybe with io_uring there could be more threads, the question is how
many io-threads QEMU would be using in your setup. Hard to tell.

-- 
Cheers,

David