diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/1003')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/1003 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/1003 b/results/classifier/accel-gemma3:12b/kvm/1003 new file mode 100644 index 000000000..8e76c5628 --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/1003 @@ -0,0 +1,22 @@ + +"Cannot allocate memory" when boots a VM > 1026GB memory with -accel kvm +Description of problem: +I can boot an empty VM using command `qemu-system-x86_64 -m 1026G -accel kvm -vnc :1` or `qemu-system-x86_64 -m 8T -vnc :1` + +But when I use `qemu-system-x86_64 -m 1027G -accel kvm -vnc :1`, it will not boot: + +``` +root@debian11:~# qemu-system-x86_64 -m 1027G -accel kvm -vnc :1 +qemu-system-x86_64: kvm_set_user_memory_region: KVM_SET_USER_MEMORY_REGION failed, slot=1, start=0x100000000, size=0x10000000000: Cannot allocate memory +kvm_set_phys_mem: error registering slot: Cannot allocate memory +Aborted +``` + +Which means, with `-accel kvm`, it only can boot a VM which memory <= 1026G, but without these args, it can boot whatever you want. +Steps to reproduce: +1. sysctl vm.overcommit_memory=1 # enable overcommit first +2. qemu-system-x86_64 -m 1027G -accel kvm -vnc :1 +Additional information: +The qemu I use is compiled from the latest source, not the package provided by debian. + +Hardware is `PowerEdge R630` with `E5-2630 v4` * 2, 128G physical RAM. |