On 2019/8/20 16:09, Dr. David Alan Gilbert wrote:
* Peng Tao (tao.p...@linux.alibaba.com) wrote:


On 2019/8/20 00:04, Stefan Hajnoczi wrote:
I am delighted to announce the release of virtio-fs v0.3, a shared file
system that lets virtual machines access a directory tree on the host.
This release is based on QEMU 4.1.0 and Linux 5.3-rc3.

Good news! As virtio-fs is maturing and stabilizing, what's the plan for
upstreaming both qemu and kernel part of it?

We're working on that.
A few days ago I sent the core qemu code to qemu-devel marked as
experiemental;  Vivek is planning on sending another kernel version out.

Cool. Looking forward to seeing them in upstream code base;)

Cheers,
Tao
Dave

Cheers,
Tao

For more information about virtio-fs: https://virtio-fs.gitlab.io/

This is a development release aimed at early adopters of virtio-fs.  Work is
being done to upstream the code into Linux and QEMU.  We expect to stop
publishing virtio-fs releases once the code has been merged by these upstream
projects.

Where to get it:

    https://gitlab.com/virtio-fs/linux/-/tags/virtio-fs-v0.3
    https://gitlab.com/virtio-fs/qemu/-/tags/virtio-fs-v0.3

Changes:

   * Please note that the mount syntax has changed to:

       # mount -t virtio_fs myfs /mnt -o ...

     The old syntax was "mount -t virtio_fs none /mnt -o tag=myfs,...".

   * virtiofsd --fd=FDNUM takes a listen socket file descriptor number.  File
     descriptor passing is an alternative way to manage the vhost-user UNIX
     domain socket.  The parent process no longer needs to wait for virtiofsd to
     create the listen socket before spawning the VM.

   * virtiofsd --syslog logs to syslog(2) instead of stderr.  Useful for 
unifying
     logging and when the virtiofsd process is not being supervised.

   * virtiofsd --thread-pool-size=NUM sets the maximum number of worker threads
     for FUSE request processing.  This can be used to control the host queue
     depth.  The default is 64.

   * Performance improvements and bug fixes.

Note for Kata Containers: the new kernel is not compatible with existing
Kata Containers releases due to the mount syntax change.  To try it out,
please apply the following kata-runtime patch:

    
https://gitlab.com/virtio-fs/runtime/commit/a2e44de817e438c02a495cf258039774527e3178

Kata Containers patches for virtio-fs v0.3 are under development and will be
submitted to Kata soon.

Thanks to the following people for contributing code and to many more
for helping the virtio-fs effort:

Dr. David Alan Gilbert <dgilb...@redhat.com>
Eric Ren <renz...@linux.alibaba.com>
Eryu Guan <eg...@linux.alibaba.com>
Ganesh Maharaj Mahalingam <ganesh.mahalin...@intel.com>
Jiufei Xue <jiufei....@linux.alibaba.com>
Liu Bo <bo....@linux.alibaba.com>
Masayoshi Mizuma <m.miz...@jp.fujitsu.com>
Miklos Szeredi <mszer...@redhat.com>
Peng Tao <tao.p...@linux.alibaba.com>
piaojun <piao...@huawei.com>
Sebastien Boeuf <sebastien.bo...@intel.com>
Stefan Hajnoczi <stefa...@redhat.com>
Vivek Goyal <vgo...@redhat.com>
Xiaoguang Wang <xiaoguang.w...@linux.alibaba.com>


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