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image: Honor parallel job count for the number of qemu-img co-routines used.

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This doesn't seem to change anything currently (the default is 8).  Perhaps
useful in the future, for example if the compressor used by qemu-img starts
honoring it.

* gnu/build/image.scm (convert-disk-image): Specify the '-m' option.

Change-Id: Ia288c85af8a0621d61cf6b9f0d3f73f5a3026d66
This commit is contained in:
Maxim Cournoyer 2025-04-30 16:23:52 +09:00
parent b130a868dc
commit ca8a0f4d1b
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1 changed files with 4 additions and 1 deletions
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5
gnu/build/image.scm
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@ -178,7 +178,10 @@ ROOT directory to populate the image."
(case format
((compressed-qcow2)
(invoke "qemu-img" "convert" "-c" "-f" "raw"
"-O" "qcow2" image output))
;; The maximum number of co-routines is 16.
"-m" (number->string (min 16 (parallel-job-count)))
"-O" "qcow2"
image output))
(else
(copy-file image output))))