On Thu, 11 Dec 2025, Askar Safin wrote:
> Mikulas Patocka <[email protected]>:
> > So, this is what happened to you - the machine runs out of memory, it
> > needs to swap out some pages, dm-crypt encrypts the pages and generates
> > write bios, the write bios are directed to the loop device, the loop
> > device directs them to the filesystem, the filesystem attempts to allocate
> > more memory => deadlock.
>
> Does similar thing happen in my case? I. e. swap on top of dm-integrity on
> top of partition? Is my use case supported? (I'm not talking about
> hibernation now, just about swap.)
>
> --
> Askar Safin
Hi
Dm integrity doesn't need to allocate memory when processing I/O requests
(it reserves some memory using mempools). So, dm-integrity on the top of a
partition should be safe.
Mikulas
