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| author | Josselin Poiret <dev@jpoiret.xyz> | 2021-11-15 20:26:29 +0000 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2021-11-23 10:24:27 +0100 |
| commit | 0831dfab75b4db9c8bcbc9b2d1e52d8db54d0ad9 (patch) | |
| tree | aef9cfe9d813c6ddbada36230eb07fa8fe9c4bea /gnu | |
| parent | f574dbd163f8b2d417c6d7ee08559626ae52b7c5 (diff) | |
| download | guix-0831dfab75b4db9c8bcbc9b2d1e52d8db54d0ad9.tar.gz | |
system: Add swap flags.
* gnu/system/file-systems.scm (swap-space)[priority, discard?]: Add them. * guix/build/syscalls.scm (SWAP_FLAG_PREFER, SWAP_FLAG_PRIO_MASK, SWAP_FLAG_PRIO_SHIFT, SWAP_FLAG_DISCARD): Add them. * gnu/build/file-systems.scm (swap-space->flags-bit-mask): Add it. * gnu/services/base.scm (swap-service-type): Use it. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/build/file-systems.scm | 36 | ||||
| -rw-r--r-- | gnu/services/base.scm | 7 | ||||
| -rw-r--r-- | gnu/system/file-systems.scm | 10 |
3 files changed, 48 insertions, 5 deletions
diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm index d8a5ddf1e5..d95340df83 100644 --- a/gnu/build/file-systems.scm +++ b/gnu/build/file-systems.scm @@ -29,6 +29,8 @@ #:use-module (guix build bournish) #:use-module ((guix build syscalls) #:hide (file-system-type)) + #:use-module (guix diagnostics) + #:use-module (guix i18n) #:use-module (rnrs io ports) #:use-module (rnrs bytevectors) #:use-module (ice-9 match) @@ -54,7 +56,9 @@ mount-flags->bit-mask check-file-system - mount-file-system)) + mount-file-system + + swap-space->flags-bit-mask)) ;;; Commentary: ;;; @@ -227,6 +231,36 @@ if DEVICE does not contain an linux-swap file system." "Return the label of Linux-swap superblock SBLOCK as a string." (null-terminated-latin1->string (sub-bytevector sblock (+ 1024 4 4 4 16) 16))) + +(define (swap-space->flags-bit-mask swap) + "Return the number suitable for the 'flags' argument of 'mount' +that corresponds to the swap-space SWAP." + (define prio-flag + (let ((p (swap-space-priority swap)) + (max (ash SWAP_FLAG_PRIO_MASK (- SWAP_FLAG_PRIO_SHIFT)))) + (if p + (logior SWAP_FLAG_PREFER + (ash (cond + ((< p 0) + (begin (warning + (G_ "Given swap priority ~a is +negative, defaulting to 0.~%") p) + 0)) + ((> p max) + (begin (warning + (G_ "Limiting swap priority ~a to +~a.~%") + p max) + max)) + (else p)) + SWAP_FLAG_PRIO_SHIFT)) + 0))) + (define delayed-flag + (if (swap-space-discard? swap) + SWAP_FLAG_DISCARD + 0)) + (logior prio-flag delayed-flag)) + ;;; diff --git a/gnu/services/base.scm b/gnu/services/base.scm index 35f38c7e09..20736eb13f 100644 --- a/gnu/services/base.scm +++ b/gnu/services/base.scm @@ -58,7 +58,8 @@ #:use-module (gnu packages linux) #:use-module (gnu packages terminals) #:use-module ((gnu build file-systems) - #:select (mount-flags->bit-mask)) + #:select (mount-flags->bit-mask + swap-space->flags-bit-mask)) #:use-module (guix gexp) #:use-module (guix records) #:use-module (guix modules) @@ -2223,7 +2224,9 @@ instance." (let ((device #$device-lookup)) (and device (begin - (restart-on-EINTR (swapon device)) + (restart-on-EINTR (swapon device + #$(swap-space->flags-bit-mask + swap))) #t))))) (stop #~(lambda _ (let ((device #$device-lookup)) diff --git a/gnu/system/file-systems.scm b/gnu/system/file-systems.scm index 027df7e966..e1d1fb72cc 100644 --- a/gnu/system/file-systems.scm +++ b/gnu/system/file-systems.scm @@ -102,7 +102,9 @@ swap-space swap-space? swap-space-target - swap-space-dependencies)) + swap-space-dependencies + swap-space-priority + swap-space-discard?)) ;;; Commentary: ;;; @@ -726,6 +728,10 @@ subvolume name is unknown.")) this-swap-space (target swap-space-target) (dependencies swap-space-dependencies - (default '()))) + (default '())) + (priority swap-space-priority + (default #f)) + (discard? swap-space-discard? + (default #f))) ;;; file-systems.scm ends here |