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vsock/README: simplify the examples using memfd

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In the examples we used hugepages, which could be useful in
special cases where the performance matters, but this requires
specific configuration and permissions to allocate them.

Let's simplify the examples by using memfd, removing
`--mem-prealloc`, and the superfluous `-m 512M`.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
This commit is contained in:
Stefano Garzarella 2024-06-11 09:41:01 +02:00 committed by Manos Pitsidianakis
parent e01d5e6bfe
commit 4c45d03d26
1 changed files with 7 additions and 7 deletions
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14
vhost-device-vsock/README.md
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@ -83,7 +83,7 @@ Run VMM (e.g. QEMU):
```
qemu-system-x86_64 \
<normal QEMU options> \
-object memory-backend-file,share=on,id=mem0,size=<Guest RAM size>,mem-path=<Guest RAM file path> \ # size == -m size
-object memory-backend-memfd,id=mem0,size=<Guest RAM size> \ # size == -m size
-machine <machine options>,memory-backend=mem0 \
-chardev socket,id=char0,reconnect=0,path=<vhost-user socket path> \
-device vhost-user-vsock-pci,chardev=char0
@ -101,8 +101,8 @@ shell1$ vhost-device-vsock --vm guest-cid=4,uds-path=/tmp/vm4.vsock,socket=/tmp/
```sh
shell2$ qemu-system-x86_64 \
-drive file=vm.qcow2,format=qcow2,if=virtio -smp 2 -m 512M -mem-prealloc \
-object memory-backend-file,share=on,id=mem0,size=512M,mem-path="/dev/hugepages" \
-drive file=vm.qcow2,format=qcow2,if=virtio -smp 2 \
-object memory-backend-memfd,id=mem0,size=512M \
-machine q35,accel=kvm,memory-backend=mem0 \
-chardev socket,id=char0,reconnect=0,path=/tmp/vhost4.socket \
-device vhost-user-vsock-pci,chardev=char0
@ -159,14 +159,14 @@ For example, if you have two VMs with CID 3 and 4, you can run the following com
shell1$ vhost-device-vsock --vm guest-cid=3,uds-path=/tmp/vm3.vsock,socket=/tmp/vhost3.socket,groups=group1+group2 \
--vm guest-cid=4,uds-path=/tmp/vm4.vsock,socket=/tmp/vhost4.socket,groups=group1
shell2$ qemu-system-x86_64 \
-drive file=vm1.qcow2,format=qcow2,if=virtio -smp 2 -m 512M -mem-prealloc \
-object memory-backend-file,share=on,id=mem0,size=512M,mem-path="/dev/hugepages" \
-drive file=vm1.qcow2,format=qcow2,if=virtio -smp 2 \
-object memory-backend-memfd,id=mem0,size=512M \
-machine q35,accel=kvm,memory-backend=mem0 \
-chardev socket,id=char0,reconnect=0,path=/tmp/vhost3.socket \
-device vhost-user-vsock-pci,chardev=char0
shell3$ qemu-system-x86_64 \
-drive file=vm2.qcow2,format=qcow2,if=virtio -smp 2 -m 512M -mem-prealloc \
-object memory-backend-file,share=on,id=mem0,size=512M,mem-path="/dev/hugepages2" \
-drive file=vm2.qcow2,format=qcow2,if=virtio -smp 2 \
-object memory-backend-memfd,id=mem0,size=512M \
-machine q35,accel=kvm,memory-backend=mem0 \
-chardev socket,id=char0,reconnect=0,path=/tmp/vhost4.socket \
-device vhost-user-vsock-pci,chardev=char0