On Wed, 24 Mar 2010 09:28:36 +0530 "Aneesh Kumar K. V" <aneesh.ku...@linux.vnet.ibm.com> wrote:
> On Tue, 23 Mar 2010 20:17:33 -0300, Luiz Capitulino <lcapitul...@redhat.com> > wrote: > > On Tue, 16 Mar 2010 14:44:58 +0530 > > "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com> wrote: > > > > > Hi, > > > > > > > > > This patch series adds a paravirtual file system passthrough mechanism to > > > QEMU > > > based on the 9P protocol. With the current implementation, all I/O is > > > implemented > > > in the VCPU thread. We've modified the protocol handlers so that we can > > > support > > > dispatch I/O in a thread pool. The actual thread pool implementation will > > > be posted later > > > > > > This patch set should work with any recent Linux kernel as virtio-9p has > > > been > > > supported for a few kernel releases now. Export dir is specified using > > > the below > > > Qemu option. > > > > > > -device virtio-9p-pci,share_path=/mnt/,mount_tag=v_mnt > > > > > > mount_tag is used to identify the mount point in the kernel. This will be > > > available in Linux > > > kernel via /sys/devices/virtio-pci/virtio1/mount_tag file. > > > > I tried this very '-device' line and I can see that the guest has loaded > > the virtio modules, but there isn't anything in the virtio0 directory other > > than standard sysfs files. > > > > Is there a way to debug this? > > > > which version of the kernel ? 2.6.31.5 > The latest linus tree have all the needed > changes. You should have /sys/bus/virtio/drivers/9pnet_virtio/ if you > have CONFIG_NET_9P_VIRTIO enabled. I have it, but still no mount_tag. I'll try with a more recent kernel but this will take more time. > You can then find mount tag at virtio<n>/mount_tag > > > > Something possibly related is that, I had to rewind the tree by some > > commits > > because this series doesn't apply against current HEAD. > > > > The patches are against 0aef4261ac0ec9089ade0e3a92f986cb4ba7317e of the > master branch > > > -aneesh