Blame SOURCES/95-kvm-memlock.conf

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# The KVM HV implementation on Power can require a significant amount
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# of unswappable memory (about half of which also needs to be host
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# physically contiguous) to hold the guest's Hash Page Table (HPT) -
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# roughly 1/64th of the guest's RAM size, minimum 16MiB.
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#
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# These limits allow unprivileged users to start smallish VMs, such as
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# those used by libguestfs.
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#
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*	hard	memlock		65536
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*	soft	memlock		65536