Public bug reported:
This behavior is very inconsistent. I'm using btrfs, which only recently
received swap file support as of linux kernel version 5.0. I followed
the directions to get a swap file working on btrfs, including using
resume=swap_device and resume_offset=swap_file_offset. The physical
offset was retrieved using this script: https://github.com/osandov
/osandov-linux/blob/master/scripts/btrfs_map_physical.c. I then divided
the physical offset by the page size to get the resume offset. At best,
hibernating into a swap file only works the first time after creation.
Every subsequent hibernation leads my system to boot as if it were not
resuming. At worst, hibernating causes the backing device to unattach
from the caching device, leading to an unbootable system. I then have to
forcefully recreate the cache in order to fix it. I should also mention
that at one point I think my filesystem became corrupted since there
were quite a lot of missing files, including commands, that made my
system unusable. I then had to reinstall the whole system.
** Affects: bcache-tools (Ubuntu)
Importance: Undecided
Status: New
** Summary changed:
- Backing device unattaches from caching device when hibernating into a swapfile
+ Backing device unattaches from caching device when hibernating into a swap
file
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https://bugs.launchpad.net/bugs/1878340
Title:
Backing device unattaches from caching device when hibernating into a
swap file
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