Hello,
"Thomas Schmitt" <scdbac...@gmx.net> skribis:
> The fact that the VM always sees the expected size but the host sees varying
> sizes supports the suspicion that at the end of the VM its i/o buffers or
> virtual disk are not always properly flushed to the i/o system of the host.
> The varying success smells like a race condition.
Indeed, that rings a bell: I fixed a similar issue in commit
0dc7d298a33f83d5f02a962b5f1bd24ee0e8ef07.
Florian: could you check whether the patch below solves the problem for
you?
Thanks,
Ludo’.
diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index db9b1707d7..3ee03c84a0 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -240,7 +240,11 @@ made available under the /xchg CIFS share."
#:target-arm32? #$(target-arm32?)
#:disk-image-format #$disk-image-format
#:disk-image-size size
- #:references-graphs graphs))))))
+ #:references-graphs graphs)
+
+ ;; Make sure I/O buffers get flushed. This is particularly
+ ;; important when MAKE-DISK-IMAGE? is true.
+ (sync))))))
(gexp->derivation name builder
;; TODO: Require the "kvm" feature.
@@ -530,10 +534,7 @@ should set REGISTER-CLOSURES? to #f."
#$os
#:compressor '(#+(file-append gzip "/bin/gzip") "-9n")
#:creation-time (make-time time-utc 0 1)
- #:transformations `((,root-directory -> "")))
-
- ;; Make sure the tarball is fully written before rebooting.
- (sync))))))
+ #:transformations `((,root-directory -> ""))))))))
(expression->derivation-in-linux-vm
name build
#:make-disk-image? #f
