<html><body>Hi Stefan, I believe s390 does support vhost-user. I can bring up a guest with virtio-fs specific options: -chardev socket,id=char0,path=/tmp/vhostqemu \ -device vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=myfs \ -object memory-backend-file,id=mem,size=8G,mem-path=/dev/shm,share=on but leave out the -numa option. I can see virtiofsd is getting messages (with -o debug option) when the guest boots up. But of course if I try to mount inside the guest nothing happens. <img width="16" height="16" src="cid:1__=8FBB0E5CDFC6F1F28f9e8a93df938690918c8FB@" border="0" alt="Inactive hide details for Stefan Hajnoczi ---12/13/2019 06:02:53 AM---On Thu, Dec 12, 2019 at 01:55:25PM -0500, Gong Su wrote: ">Stefan Hajnoczi ---12/13/2019 06:02:53 AM---On Thu, Dec 12, 2019 at 01:55:25PM -0500, Gong Su wrote: > Basically, I'm trying to see if I can get From: Stefan Hajnoczi <stefanha@redhat.com> To: Gong Su <gongsu@us.ibm.com> Cc: virtio-fs@redhat.com, Cornelia Huck <cohuck@redhat.com> Date: 12/13/2019 06:02 AM Subject: [EXTERNAL] Re: [Virtio-fs] virtio-fs on zLinux (s390x) <hr width="100%" size="2" align="left" noshade style="color:#8091A5; "> <tt>On Thu, Dec 12, 2019 at 01:55:25PM -0500, Gong Su wrote: > Basically, I'm trying to see if I can get virtio-fs to work on zLinux. > Following the instructions on </tt><tt><a href="https://virtio-fs.gitlab.io/howto-qemu.html">https://virtio-fs.gitlab.io/howto-qemu.html</a></tt><tt> I > was able to compile all the pieces but when I tried to run qemu I realized > that it needs -numa option which isn't supported on s390x yet. Does s390 support vhost-user? virtio-fs is implemented as a vhost-user device so this is a requirement. Shared memory is a vhost-user requirement and that's where the -numa command-line option dependency comes from. Stefan [attachment "signature.asc" deleted by Gong Su/Watson/IBM] </tt> </body></html>