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Description of problem: Boot guest with more than 64 numa nodes, qemu will show "qemu: too many NUMA nodes". RHEL7.0 support Max vcpu number is 255(the recommended cpus is 160), so qemu-kvm should support numa number >=160 Version-Release number of selected component (if applicable): qemu-kvm-1.5.3-19.el7.x86_64 3.10.0-48.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. /usr/libexec/qemu-kvm -M q35 -cpu Opteron_G4 -enable-kvm -m 20G -smp 80 ....-numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node -numa node(65) 2. 3. Actual results: qemu: too many NUMA nodes Expected results: qemu-kvm boot successfully. and can support >=160 numa nodes Additional info:
(In reply to FuXiangChun from comment #0) > Expected results: > qemu-kvm boot successfully. and can support >=160 numa nodes Why? Does a config like that make any sense? If so, then please point to the use case / customer request. 64 is the current limit. Since 64 appears to work, then I'm closing this as not-a-bug. Note, there's an upstream patch (still pending) that could bump it to 128 at some point, but that's unlikely to be merged and backported for 7.0.