Xen devel - Dec 2008 - Mounting blktap filesystem in two domU''s

I''m experimenting with mounting a cluster filesystem in two different
paravirtualized domains on the same physical machine.  I can successfully
mount them when I use ''file:/path/to/clusterfs.img,hdb,w!'' but
cacheing
in domain0 will probably mess up the cluster so I''d like to use
"tap:aio:" instead of "file:"  However when I substitute the
prefix,
I get:

Error: Device 832 (tap) could not be connected.
/path/to/clusterfs.img already in use by another domain

Is the "w!" syntax correct for tap:aio (in which case I may be
doing something else wrong, or perhaps it is a bug)?  Or is
there another way to force this to work?  (It appears I get the
same error even if I use readonly ("r") for both domains.)

Thanks for any help!
Dan

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel