Re: [Xen-users] HVM domU on storage driver domain

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, Mar 01, 2017 at 10:44:02PM +0800, G.R. wrote:
> On Tue, Feb 28, 2017 at 11:44 PM, Roger Pau Monné <roger.pau@xxxxxxxxxx> 
> wrote:
> >> It's not clear to me what the time-outed watch is waiting for.
> >> While the disk back-end is highly suspicious, the context in the
> >> passing log looks more vif related.
> >
> > Neither to me, it seems like the stubdomain doesn't start correctly, but the
> > stubdom log doesn't give any clues about what might cause it (or at least 
> > I'm
> > not able to identify them). Can you please apply the following patch, try to
> > create the domain (this time using the stubdom), and after 30s do 
> > `xenstore-ls
> > -fp` in the Dom0 and paste the results here?
> >
> > This way I will know if the frontends in the stubdom have attached 
> > correctly.
> >
> Please find the requested log in the attachment.
> I also attached the qemu log from the stubdomain. Not very interesting
> from my POV, just for reference.
> 
> Quoting how VBDs are shown up on different domU.
> It sounds like both are correctly connected, even though different
> number of ring pages are used.
> *xvda for the running FreeNAS domU:
> /local/domain/1/device/vbd = ""   (n0,r1)
> /local/domain/1/device/vbd/51712 = ""   (n1,r0)
> /local/domain/1/device/vbd/51712/backend =
> "/local/domain/0/backend/vbd/1/51712"   (n1,r0)
> /local/domain/1/device/vbd/51712/backend-id = "0"   (n1,r0)
> /local/domain/1/device/vbd/51712/state = "4"   (n1,r0)
> /local/domain/1/device/vbd/51712/virtual-device = "51712"   (n1,r0)
> /local/domain/1/device/vbd/51712/device-type = "disk"   (n1,r0)
> /local/domain/1/device/vbd/51712/ring-ref0 = "768"   (n1,r0)
> /local/domain/1/device/vbd/51712/ring-ref1 = "769"   (n1,r0)
> /local/domain/1/device/vbd/51712/ring-ref2 = "770"   (n1,r0)
> /local/domain/1/device/vbd/51712/ring-ref3 = "771"   (n1,r0)
> /local/domain/1/device/vbd/51712/num-ring-pages = "4"   (n1,r0)
> /local/domain/1/device/vbd/51712/ring-page-order = "2"   (n1,r0)
> /local/domain/1/device/vbd/51712/event-channel = "8"   (n1,r0)
> /local/domain/1/device/vbd/51712/protocol = "x86_64-abi"   (n1,r0)
> 
> *xvda for the ruibox-dm stubdomain:
> /local/domain/3/device/vbd = ""   (n0,r3)
> /local/domain/3/device/vbd/51712 = ""   (n3,r1)
> /local/domain/3/device/vbd/51712/backend =
> "/local/domain/1/backend/vbd/3/51712"   (n3,r1)
> /local/domain/3/device/vbd/51712/backend-id = "1"   (n3,r1)
> /local/domain/3/device/vbd/51712/state = "4"   (n3,r1)
> /local/domain/3/device/vbd/51712/virtual-device = "51712"   (n3,r1)
> /local/domain/3/device/vbd/51712/device-type = "disk"   (n3,r1)
> /local/domain/3/device/vbd/51712/protocol = "x86_64-abi"   (n3,r1)
> /local/domain/3/device/vbd/51712/ring-ref = "1789"   (n3,r1)
> /local/domain/3/device/vbd/51712/event-channel = "5"   (n3,r1)

Hm, can you please paste the full output of xenstore-ls -fp, I also want to see
if the stubdomain correctly sets the "initialized" stated
(/local/domain/XX/device-model/YY/state), and the state of the backend in the
driver domain (/local/domain/1/backend/).

Roger.

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