[pkg-cryptsetup-devel] Bug#1016474: cryptsetup: The system installed on encrypted LVM (both root and swap partitions) freezes during massive writes

[Wojciech Zabołotny]

W dniu 01.08.2022 o 13:12, Guilhem Moulin pisze:
> Control: tag -1 + moreinfo
>
> Hi,
>
> On Mon, 01 Aug 2022 at 12:27:39 +0200, Wojciech Zabołotny wrote:
>> That configuration generally works, but if a massive write operations
>> are performed, the syste, practically freezes.
> What makes you think that is a src:cryptsetup issue?  Nothing in this
> package is involved once the device has been mapped.
>
Hi, the problem is indeed complex. I'm not sure that it is really a
cryptsetup issue.
It may be related to incorrect assignment of priorities to kernel
threads responsible for encryption and swapping.

The problem is also not new:
https://superuser.com/questions/1666684/debian-testing-linux-on-an-encrypted-lvm-filesystem-intensive-operations-cause

Then it seemed that it is related to lack of entropy, but installation
of haveged didn't solve the problem.

Well, maybe I should try recipes given here:
https://askubuntu.com/questions/1406444/what-is-causing-my-system-to-stall-freeze-corrupt-data-when-using-lvm-luks
and here: https://blog.cloudflare.com/speeding-up-linux-disk-encryption/

With best regards,
Wojtek