[bug#51346] [PATCH 0/1 core-updates-frozen] Rework swap device to add dependencies and flags

[Josselin Poiret via Guix-patches via <guix-patches@gnu.org>]

Hi,

This patchset adds new record types swap-partition and swap-file, to be used in the swap-devices field of operating-system. These support dependencies on mapped-device and file-system objects respectively, as well as swapon flags. I pulled those from GNU libc, and in the manual I refer to 'man 2 swapon' for the description of these flags. Support for the old style is kept for now, but I added deprecation warnings.

This works well on my laptop, whereas my swap file used to never be swapon on boot because it wasn't available yet (on BTRFS on LUKS). I don't have a swap partition lying around though so testers welcome!

I hope this can make it in time for the core-updates-frozen merge. I also plan to add swap file hibernation support eventually, where the file offsets are automatically determined by guix (or we could even write our own suspend/resume script in guile, see https://www.kernel.org/doc/html/latest/power/userland-swsusp.html).

Josselin Poiret (1):
  gnu: system: Add support for swap dependencies and flags

 doc/guix.texi               |  98 +++++++++++++++++++---------
 gnu/build/file-systems.scm  |  25 ++++++-
 gnu/services/base.scm       | 126 ++++++++++++++++++++++++++----------
 gnu/system.scm              |   4 +-
 gnu/system/file-systems.scm |  34 +++++++++-
 guix/build/syscalls.scm     |  12 ++++
 6 files changed, 230 insertions(+), 69 deletions(-)

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2.33.1