[Virtio-fs] xfstest results for virtio-fs on aarch64

[Boeuf, Sebastien]

On Wed, 2019-10-16 at 19:38 +0100, Stefan Hajnoczi wrote:
> On Wed, Oct 16, 2019 at 04:14:25PM +0000, Boeuf, Sebastien wrote:
> > On Wed, 2019-10-16 at 15:14 +0100, Stefan Hajnoczi wrote:
> > > On Wed, Oct 16, 2019 at 03:21:52AM +0900, Chirantan Ekbote wrote:
> > > > On Wed, Oct 16, 2019 at 2:28 AM Boeuf, Sebastien
> > > > <sebastien.boeuf at intel.com> wrote:
> > > > > Thanks Dave for adding me to the loop here!
> > > > > 
> > > > > On Tue, 2019-10-15 at 17:26 +0100, Dr. David Alan Gilbert
> > > > > wrote:
> > > > > > * Chirantan Ekbote (chirantan at chromium.org) wrote:
> > > > > > > On Wed, Oct 16, 2019 at 12:58 AM Dr. David Alan Gilbert
> > > > > > > <dgilbert at redhat.com> wrote:
> > > > > > > > * Chirantan Ekbote (chirantan at chromium.org) wrote:
> > > > > > > > > I'm not using virtiofsd.  We have our own server for
> > > > > > > > > crosvm,
> > > > > > > > > which
> > > > > > > > > supports multiple queues.
> > > > > > > > 
> > > > > > > > Ah excellent; is that public anywhere?
> > > > > > > > 
> > > > > > > 
> > > > > > > It's currently under review here:
> > > > > > > https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1758103
> > > > > > > 
> > > > > > > I expect to have it merged sometime this week.
> > > > > 
> > > > > Oh that's very nice to hear. We have some code from the
> > > > > cloud-
> > > > > hypervisor project where we have a vhost-user-net
> > > > > implementation
> > > > > relying on some sort of a wrapper code similar to what all
> > > > > vhost-
> > > > > user
> > > > > daemon implementations would reuse (libvhost-user kind of
> > > > > thing).
> > > > > 
> > > > > We're planning to see this wrapper code land on Rust-VMM at
> > > > > some
> > > > > point,
> > > > > which is why it would be interesting if you could rebase this
> > > > > virtio-fs
> > > > > daemon code on top of this small library. If you don't have
> > > > > the
> > > > > bandwidth, we could probably look at it if that's something
> > > > > you
> > > > > would
> > > > > be interested in.
> > > > > 
> > > > > Here is the code for the small wrapper crate:
> > > > > https://github.com/intel/cloud-hypervisor/blob/master/vhost_user_backend/src/lib.rs
> > > > > 
> > > > > And here is the vhost-user-net example using it:
> > > > > https://github.com/intel/cloud-hypervisor/blob/master/src/bin/vhost_user_net.rs
> > > > > 
> > > > 
> > > > Our virtio-fs server is not a vhost-user device (this was one
> > > > of
> > > > the
> > > > reasons we didn't want to use virtiofsd).  It currently just
> > > > runs
> > > > directly as a child process of crosvm (like all other crosvm
> > > > devices).
> > > > So unless I'm missing something I don't think there's much to
> > > > be
> > > > gained by rebasing on vhost_user_backend.
> > > 
> > > I'm also interested in porting the server over to vhost-user so
> > > that
> > > other VMMs like QEMU and cloud-hypervisor can use it.
> > 
> > Yes I agree that'd be awesome!
> > Are you planning to start working on this soon? Just asking as I
> > want
> > to avoid potential duplicated efforts :)
> 
> Not immediately.  If you are ready to work on it and make your branch
> public then we can follow along.

Unfortunately, I don't have free cycles right now either. I'll ask
internally if we can have someone looking at it, and also I might have
some time later next week.

I'll keep you posted!

Thanks,
Sebastien

> 
> Stefan