<html><body>Hi Igor, that would be great. Thanks. <img width="16" height="16" src="cid:1__=8FBB0E5CDFC5F0F48f9e8a93df938690918c8FB@" border="0" alt="Inactive hide details for Igor Mammedov ---12/13/2019 08:17:53 AM---On Thu, 12 Dec 2019 14:10:32 -0500 "Gong Su" <gongsu@us.ibm">Igor Mammedov ---12/13/2019 08:17:53 AM---On Thu, 12 Dec 2019 14:10:32 -0500 "Gong Su" <gongsu@us.ibm.com> wrote: From: Igor Mammedov <imammedo@redhat.com> To: "Gong Su" <gongsu@us.ibm.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Cornelia Huck <cohuck@redhat.com>, virtio-fs@redhat.com Date: 12/13/2019 08:17 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, 12 Dec 2019 14:10:32 -0500 "Gong Su" <gongsu@us.ibm.com> wrote: > > Thanks Dave. That was quick! > > Igor, any idea when this will happen? :-) If you need early sneak peek, I can post common + s390 patches. > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com> > To: Gong Su <gongsu@us.ibm.com> > Cc: virtio-fs@redhat.com, Cornelia Huck <cohuck@redhat.com> > Date: 12/12/2019 01:59 PM > Subject: [EXTERNAL] Re: [Virtio-fs] virtio-fs on zLinux (s390x) > > > > * Gong Su (gongsu@us.ibm.com) wrote: > > > > > > Hi Stefan, I'm resending my questions to the list per your request. > > > > 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. > > > > I have talked to Christian Borntraeger (whom I worked with on other > > projects before) and he indicated that he had a plan to add -numa support > > for s390x but currently is busy on other things. > > > > So I'm trying to see if there are other ways for me to go forward without > > having to wait for Christian. I see two options: > > > > 1. Merge virtiofsd into qemu itself. In the "Interchangeability" section > of > > the virtio-fs design page ( > </tt><tt><a href="https://virtio-fs.gitlab.io/design.html">https://virtio-fs.gitlab.io/design.html</a></tt><tt> > ), it > > mentioned that "It is also possible to forego vhost-user and emulate the > > virtio-fs device directly inside the hypervisor, although this may result > > in poor isolation and security." Since each guest typically gets its own > > qemu process, maybe this is acceptable for some use cases. In exchange, > you > > get the benefit of not having to carve out a chunk of memory > from /dev/shm > > (and maybe simpler communication between virtiofsd and qemu). > > 2. Use something other than -numa to share memory between virtiofsd and > > qemu that's supported on zLinux. I'm not entirely familiar with qemu so I > > have no idea whether this is possible or not. > > Hi, > My understanding is that Igor Mammedov (imammedo@redhat.com) has plans > to allow 'shared' to be set on main memory, so we wouldn't need the numa > code. > > Dave > > > Thanks. > > > _______________________________________________ > > Virtio-fs mailing list > > Virtio-fs@redhat.com > > > </tt><tt><a href="https://www.redhat.com/mailman/listinfo/virtio-fs">https://www.redhat.com/mailman/listinfo/virtio-fs</a></tt><tt> > > > -- > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > > > > </tt> </body></html>