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[kvm] improve the handling of compact_memory during kvm image build (#9184)

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Build failed on a Ubuntu 20.04 system with kvm kernel, which does not have the /proc/sys/vm/compact_memory 
Should check if compact_memory is writeable before doing it.

Signed-off-by: Chris Ward <tjcw@uk.ibm.com>
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Chris Ward 2021-11-10 16:31:03 +00:00 committed by GitHub
parent 475bfc9625
commit f8688bef8d
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1 changed files with 5 additions and 1 deletions
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6
scripts/build_kvm_image.sh
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@ -59,7 +59,11 @@ free -m
if [[ "$vs_build_prepare_mem" == "yes" ]]; then if [[ "$vs_build_prepare_mem" == "yes" ]]; then
# Force o.s. to drop cache and compact memory so that KVM can get 2G memory # Force o.s. to drop cache and compact memory so that KVM can get 2G memory
bash -c 'echo 1 > /proc/sys/vm/drop_caches' bash -c 'echo 1 > /proc/sys/vm/drop_caches'
bash -c 'echo 1 > /proc/sys/vm/compact_memory' # Not all kernels support compact_memory
if [[ -w '/proc/sys/vm/compact_memory' ]]
then
bash -c 'echo 1 > /proc/sys/vm/compact_memory'
fi
free -m free -m
fi fi