[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC] VirtFS support on Xen
> -----Original Message----- > From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel- > bounces@xxxxxxxxxxxxx] On Behalf Of Wei Liu > Sent: 22 January 2016 10:51 > To: Bob Liu > Cc: Xen-devel; Wei Liu; David Vrabel > Subject: Re: [Xen-devel] [RFC] VirtFS support on Xen > > On Fri, Jan 22, 2016 at 06:45:30PM +0800, Bob Liu wrote: > > Hi Wei, > > > > On 01/21/2016 06:59 PM, Wei Liu wrote: > > > On Thu, Jan 21, 2016 at 10:50:08AM +0000, David Vrabel wrote: > > >> On 21/01/16 10:28, Wei Liu wrote: > > >>> [RFC] VirtFS support on Xen > > >>> > > >>> # Introduction > > >>> > > >>> QEMU/KVM supports file system passthrough via an interface called > > >>> VirtFS [0]. VirtFS is in turn implemented with 9pfs protocol [1] and > > >>> VirtIO transport. > > >>> > > >>> Xen used to have its own implementation of file system passthrough > > >>> called XenFS, but that has been inactive for a few years. The latest > > >>> update was in 2009 [2]. > > >>> > > >>> This project aims to add VirtFS support on Xen. This is more > > >>> sustainable than inventing our own wheel.# > > >> > > >> What's the use case for this? Who wants this feature? > > >> > > > > > > Anyone who wants file system passthrough. More specifically, VM- > based > > > container solutions can share files from host file system. > > > > > > > I'm a bit confused, can't we just use the VirtFS of Qemu? > > E.g > > ./configure --with-extra-qemuu-configure-args="--enable-virtfs" > > > > Yes, in theory you can -- with VirtIO transport. But I'm not sure if > Virtio has been fixed to work with Xen. That also means you need QEMU > emulation, which we don't really need (or want) when running in PV or > PVH mode. > Is there not scope for: a) Fixing VirtIO so it does work with Xen? b) Resurrecting the idea of emulator disaggregation so that we could spawn a QEMU that only serves as a VirtIO backend so that this can be used for PV/PHV guests? Seems like a better solution that implementing our own 9p transport and backend. Paul > > Wei. > > > > Thanks, > > Bob > > > > > http://xendevsummit2015.sched.org/event/3WDg/xen-containers- > better-way-to-run-docker-containers-sainath-grandhi- > intel?iframe=no&w=&sidebar=yes&bg=no > > > http://xendevsummit2015.sched.org/event/3X1L/hyper-make-vm-run- > like-containers-xu-wang-hyper?iframe=no&w=&sidebar=yes&bg=no > > > > > > Wei. > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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