I found and try to fix a bug, which shows below.
[Problem]
---------
As I use this command:
./x86_64-softmmu/qemu-system-x86_64 \
-hda /image/fedora.img \
-m 1G,slots=4,maxmem=4G \
-enable-kvm \
-smp 2,maxcpus=8,sockets=2,cores=2,threads=2 \
-device qemu64-x86_64-cpu,id=cpu1,socket-id=0,core-id=1,thread-id=0 \
-device qemu64-x86_64-cpu,id=cpu2,socket-id=0,core-id=1,thread-id=1 \
-device qemu64-x86_64-cpu,id=cpu3,socket-id=1,core-id=0,thread-id=0 \
-device qemu64-x86_64-cpu,id=cpu4,socket-id=1,core-id=0,thread-id=1 \
-device qemu64-x86_64-cpu,id=cpu5,socket-id=1,core-id=1,thread-id=0 \
-device qemu64-x86_64-cpu,id=cpu6,socket-id=1,core-id=1,thread-id=1 \
-numa node,nodeid=0,cpus=0-1 \
-numa node,nodeid=1,cpus=2-3 \
-numa node,nodeid=2,cpus=4-5 \
-numa node,nodeid=3,cpus=6-7 \
-monitor stdio \
In Qemu monitor:
(qemu) info numa
4 nodes
node 0 cpus: 0 1 2 3 4 5 6 7
node 0 size: 256 MB
node 1 cpus:
node 1 size: 256 MB
node 2 cpus:
node 2 size: 256 MB
node 3 cpus:
node 3 size: 256 MB
* It is amazing that the cpus are all in node one. *
Then, I used the "numactl -H" in the guest, and found that the mapping is
right. So I guess it is not big problem, may has some bugs in the
initialization.
I followed the initialization process and found it out.
[Solution]
----------
Ensure the numa_post_machine_init func in the appropriate location.
After the patches:
(qemu) info numa
4 nodes
node 0 cpus: 0 1
node 0 size: 256 MB
node 1 cpus: 2 3
node 1 size: 256 MB
node 2 cpus: 4 5
node 2 size: 256 MB
node 3 cpus: 6 7
node 3 size: 256 MB
Dou Liyang (2):
vl: Ensure the numa_post_machine_init func in the appropriate location
vl: Ensure the cpu_synchronize_all_post_init func in the appropriate
location
vl.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--
2.5.5
