operating-systems: buer: Add /swap/swapfile for eventual long hibernations

operating-systems/buer.scm

@@ -121,7 +121,8 @@
 
    (kernel linux-libre-6.11)
    (kernel-arguments
-    (cons* "modprobe.blacklist=usbmouse,usbkbd,pcspkr"
+    (cons* "resume=/swap/swapfile"
+           "modprobe.blacklist=usbmouse,usbkbd,pcspkr"
            "thinkpad_acpi.fan_control=1"
            (filter (negate ((on disjoin
                                 (partial partial string-prefix?))
@@ -131,7 +132,12 @@
    (file-systems
      (append file-system:volumes
              file-system:persistent-directories))
-
+   (swap-devices
+     (list (swap-space
+             (target "/swap/swapfile")
+             (dependencies
+               (filter (file-system-mount-point-predicate "/swap")
+                       file-systems)))))
    (users
     (cons* user:radio
            user:root
@@ -277,6 +283,7 @@
           #|Memory management services|#
           (service zram-device-service-type
                    (zram-device-configuration
+                    (priority 100)
                     (size (* 2 (ram-total)))
                     (compression-algorithm 'lz4)))
 

operating-systems/buer/file-systems.scm

@@ -112,6 +112,17 @@
           (needed-for-boot? #t)
           (options "mode=0755"))
 
+        #|swap|#
+        (file-system
+          (device partition:guix)
+          (type "btrfs")
+          (mount-point "/swap")
+          (check? #f)
+          (needed-for-boot? #t)
+          (options (format #f "subvol=@swap,~
+                               discard=async,~
+                               ssd")))
+
         #|home|#
         (file-system
           (device partition:guix)