xen-unstable libvchan not working

xen-unstable libvchan not working

[Francisco Rocha]

Hi everyone,

I have a machine that have built earlier this year and
libvchan works correctly.
Now, I am trying to build a new one but it doesn't work.

I have used the latest xen-unstable.
When I try the vchan-node2 test application I get:

(guest 1 is the server and guest 2 the client)

# ./vchan-node2 server 1 /local/domain/1/data/vchan-1-2
libxenvchan_*_init: No such file or directory

I thought it could be the directory in xenstored so I created it
manually but the error persists.

Anyone has came across this problem?

I have all the required modules and libraries running in
the guests:
# lsmod | grep xen
xen_gntalloc            5536  0
xen_gntdev              9019  0
xen_evtchn              5032  0
xen_kbdfront            4149  0
xen_netfront           16358  0
xenfs                   9621  1
xen_blkfront           12741  3
# mount | grep xen
none on /proc/xen type xenfs (rw,relatime)

# ls /usr/lib64/ | grep xen
libxenctrl.a
libxenctrl.so
libxenctrl.so.4.2
libxenctrl.so.4.2.0
libxenstore.a
libxenstore.so
libxenstore.so.3.0
libxenstore.so.3.0.0
libxenvchan.a
libxenvchan.so
libxenvchan.so.1.0
libxenvchan.so.1.0.0

Cheers,
Francisco

Re: xen-unstable libvchan not working

[Francisco Rocha]

On 04/25/2012 03:01 PM, Francisco Rocha wrote:
> Hi everyone,
>
> I have a machine that have built earlier this year and
> libvchan works correctly.
> Now, I am trying to build a new one but it doesn't work.
>
> I have used the latest xen-unstable.
> When I try the vchan-node2 test application I get:
>
> (guest 1 is the server and guest 2 the client)
>
> # ./vchan-node2 server 1 /local/domain/1/data/vchan-1-2
> libxenvchan_*_init: No such file or directory
>
> I thought it could be the directory in xenstored so I created it
> manually but the error persists.
>
> Anyone has came across this problem?
I have added some tracing to see which part of the init was
failing. It looks like it is xc_evtchn_open. What can cause
this to fail?
>
> I have all the required modules and libraries running in
> the guests:
> # lsmod | grep xen
> xen_gntalloc            5536  0
> xen_gntdev              9019  0
> xen_evtchn              5032  0
> xen_kbdfront            4149  0
> xen_netfront           16358  0
> xenfs                   9621  1
> xen_blkfront           12741  3
> # mount | grep xen
> none on /proc/xen type xenfs (rw,relatime)
>
> # ls /usr/lib64/ | grep xen
> libxenctrl.a
> libxenctrl.so
> libxenctrl.so.4.2
> libxenctrl.so.4.2.0
> libxenstore.a
> libxenstore.so
> libxenstore.so.3.0
> libxenstore.so.3.0.0
> libxenvchan.a
> libxenvchan.so
> libxenvchan.so.1.0
> libxenvchan.so.1.0.0
>
> Cheers,
> Francisco