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[Xen-devel] Mounting blktap filesystem in two domU's

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Subject: [Xen-devel] Mounting blktap filesystem in two domU's
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: 2008年12月17日 23:37:38 +0000 (GMT)
Delivery-date: 2008年12月17日 15:38:17 -0800
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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
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