On Mon, Feb 03, 2020 at 04:17:31PM +0000, Daniel P. Berrangé wrote:
On Thu, Jan 30, 2020 at 06:06:20PM +0100, Ján Tomko wrote:Add a document describing the usage of virtiofs. --- docs/kbase.html.in | 3 + docs/kbase/virtiofs.rst | 152 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+) create mode 100644 docs/kbase/virtiofs.rst diff --git a/docs/kbase.html.in b/docs/kbase.html.in index c156414c41..7d6caf3cb1 100644 --- a/docs/kbase.html.in +++ b/docs/kbase.html.in @@ -29,6 +29,9 @@ <dt><a href="kbase/backing_chains.html">Backing chain management</a></dt> <dd>Explanation of how disk backing chain specification impacts libvirt's behaviour and basic troubleshooting steps of disk problems.</dd> + + <dt><a href="kbase/virtiofs.html">Virtio-FS</a></dt> + <dd>Share a filesystem between the guest and the host</dd> </dl> </div> diff --git a/docs/kbase/virtiofs.rst b/docs/kbase/virtiofs.rst new file mode 100644 index 0000000000..e76ff8ca4b --- /dev/null +++ b/docs/kbase/virtiofs.rst @@ -0,0 +1,152 @@ +============================ +Sharing files with Virtio-FS +============================ + +=== 8< delete before merging 8< === +NOTE: if you're looking at this note, this is just a proposal. +See the up-to-date version on: https://libvirt.org/kbase/virtiofs.html +=== 8< --------------------- 8< ===...this shouldn't be here still
The plan was to leave it in every version posted to the mailing list, for anyone who might find it through the archives.
+ +.. contents:: + +========= +Virtio-FS +========= + +Virtio-FS is a shared file system that lets virtual machines access +a directory tree on the host. Unlike existing approaches, it +is designed to offer local file system semantics and performance. + +See https://virtio-fs.gitlab.io/ + +========== +Host setup +========== + +The host-side virtiofsd daemon, like other vhost-user backed devices, +requres shared memory between the host and the guest. As of QEMU 4.2, thisrequires+requires specifying a NUMA topology for the guest and explicitly specifying +a memory backend. Multiple options are available: + +Either of the following: + +\a) Use file-backed memoryWhy are you disabling list-ification here & throughout the file ?
I could not get it to do what I want - it kept resetting to 1. Jano
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